Work done is said to be zero, when%!

Some force acts on a body, but displacement is zero

No force acts on a body but some displacement takes place

In the equation of virtual work, following force is neglected%!

Reaction of any smooth surface with which the body is in contact

Reaction of a rough surface of a body which rolls on it without slipping

Reaction at a point or an axis, fixed in space, around which a body is constrained to turn

Combined translatory and rotational motion

According to principle of moments%!

The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point

If a system of coplanar forces is in equilibrium, then their algebraic sum is zero

If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point

Positive and negative couples can be balanced

The efficiency of a lifting machine is the ratio of%!

Work done by the machine to the work done on the machine

Mechanical advantage to the velocity ratio

The maximum height of a projectile on a horizontal plane, is%!

u¬¨‚â§ cos¬¨‚â§≈í¬±/2g

u¬¨‚â§ sin¬¨‚â§≈í¬±/2g

u¬¨‚â§ cos¬¨‚â§≈í¬±/2g

u¬¨‚â§ sin¬¨‚â§≈í¬±/g

u¬¨‚â§ cos¬¨‚â§≈í¬±/g

According to principle of transmissibility of forces, the effect of a force upon a body is%!

minimum when it acts at the C.G. of the body

maximum when it acts at the center of gravity of a body

different at different points in its line of action

the same at every point in its line of action

minimum when it acts at the C.G. of the body

For any system of coplanar forces, the condition of equilibrium is that the%!

Algebraic sum of the horizontal components of all the forces should be zero

Algebraic sum of the vertical components of all the forces should be zero

Algebraic sum of moments of all the forces about any point should be zero

A block of mass m‚Äö√á√Ö, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m‚Äö√á√á, which moves vertically downwards as shown in the below figure. The tension in the string is%!

m‚Äö√á√Ö/m‚Äö√á√á

m‚Äö√á√Ö. g. sin ≈í¬±

m‚Äö√á√Ö.m‚Äö√á√á/m‚Äö√á√Ö + m‚Äö√á√á

m‚Äö√á√Ö. m‚Äö√á√á.g (1 + sin ≈í¬±)/(m‚Äö√á√Ö + m‚Äö√á√á)

Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)%!

tan(≈í¬± - ≈ì√ú)/tan≈í¬±

tan(≈í¬± + ≈ì√ú)/tan≈í¬±

tan≈í¬±/tan (≈í¬± + ≈ì√ú)

tan(≈í¬± - ≈ì√ú)/tan≈í¬±

The range of projectile (R) on an upward inclined plane is%!

g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±

2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§

g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±

2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§

In order to determine the effects of a force, acting on a body, we must know%!

Nature of the force i.e. whether the force is push or pull

*$_The range of projectile (R) on an upward inclined plane is?

g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±

2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§

g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±

2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§

*$_Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)?

tan(≈í¬± - ≈ì√ú)/tan≈í¬±

tan(≈í¬± + ≈ì√ú)/tan≈í¬±

tan≈í¬±/tan (≈í¬± + ≈ì√ú)

tan(≈í¬± - ≈ì√ú)/tan≈í¬±

*$_A machine having an efficiency greater than 50%, is known as?

Neither reversible nor non-reversible machine

*$_Dynamic friction as compared to static friction is?

May be less of more depending on nature of surfaces and velocity

*$_Which of the following do not have identical dimensions??

Moment of a force and angular momentum

*$_In order to determine the effects of a force, acting on a body, we must know?

Nature of the force i.e. whether the force is push or pull

*$_Moment of inertia of a hollow rectangular section as shown in the below figure about X-X axis, is?

(DB¬¨‚â•/12) - (db¬¨‚â•/12)

(BD¬¨‚â•/12) - (bd¬¨‚â•/12)

(DB¬¨‚â•/12) - (db¬¨‚â•/12)

(BD¬¨‚â•/36) - (bd¬¨‚â•/36)

(DB¬¨‚â•/36) - (db¬¨‚â•/36)

*$_According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then?

The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

Their lines of action are at equal distances

The algebraic sum of their moments about any point in their plane is zero

The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

*$_The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, ≈í¬± = Angle of projection, and ≈í‚â§ = Inclination of the plane with the horizontal.)?

t = g cos ≈í‚â§/2u sin (≈í¬± + ≈í‚â§)

t = g cos ≈í‚â§/2u sin (≈í¬± - ≈í‚â§)

t = 2u sin (≈í¬± - ≈í‚â§)/g cos ≈í‚â§

t = g cos ≈í‚â§/2u sin (≈í¬± + ≈í‚â§)

t = 2u sin (≈í¬± + ≈í‚â§)/g cos ≈í‚â§

606 + Mcqs in Engineering Mechanics Page 6 McqOptions

251.	The acceleration of a body sliding down an inclined surface is%!
A.	g sin≈í‚àè
B.	g cos≈í‚àè
C.	g tan≈í‚àè
D.	None of these
Answer» B. g cos≈í‚àè

Discussion

252.	Work done is said to be zero, when%!
A.	Some force acts on a body, but displacement is zero
B.	No force acts on a body but some displacement takes place
C.	Either (A) or (B)
D.	None of the above
Answer» D. None of the above

Discussion

253.	In the equation of virtual work, following force is neglected%!
A.	Reaction of any smooth surface with which the body is in contact
B.	Reaction of a rough surface of a body which rolls on it without slipping
C.	Reaction at a point or an axis, fixed in space, around which a body is constrained to turn
D.	All of the above
Answer» E.

Discussion

254.	The product of either force of couple with the arm of the couple is called%!
A.	Resultant couple
B.	Moment of the forces
C.	Resulting couple
D.	Moment of the couple
Answer» E.

Discussion

255.	The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (≈í¬±) is%!
A.	≈í‚â§/2
B.	30¬¨‚àû + ≈í‚â§/2
C.	45¬¨‚àû + ≈í‚â§/2
D.	60¬¨‚àû + ≈í‚â§/2
Answer» D. 60¬¨‚àû + ≈í‚â§/2

Discussion

256.	A couple produces%!
A.	Translatory motion
B.	Rotational motion
C.	Combined translatory and rotational motion
D.	None of the above
Answer» C. Combined translatory and rotational motion

Discussion

257.	According to principle of moments%!
A.	If a system of coplanar forces is in equilibrium, then their algebraic sum is zero
B.	If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
C.	The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point
D.	Positive and negative couples can be balanced
Answer» C. The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point

Discussion

258.	The velocity ratio in case of an inclined plane inclined at angle '≈í‚àè' to the horizontal and weight being pulled up the inclined plane by vertical effort is%!
A.	sin≈í‚àè
B.	cos≈í‚àè
C.	tan≈í‚àè
D.	cosec≈í‚àè
Answer» B. cos≈í‚àè

Discussion

259.	The efficiency of a lifting machine is the ratio of%!
A.	Output to the input
B.	Work done by the machine to the work done on the machine
C.	Mechanical advantage to the velocity ratio
D.	All of the above
Answer» E.

Discussion

260.	The maximum height of a projectile on a horizontal plane, is%!
A.	u¬¨‚â§ sin¬¨‚â§≈í¬±/2g
B.	u¬¨‚â§ cos¬¨‚â§≈í¬±/2g
C.	u¬¨‚â§ sin¬¨‚â§≈í¬±/g
D.	u¬¨‚â§ cos¬¨‚â§≈í¬±/g
Answer» B. u¬¨‚â§ cos¬¨‚â§≈í¬±/2g

Discussion

261.	According to principle of transmissibility of forces, the effect of a force upon a body is%!
A.	maximum when it acts at the center of gravity of a body
B.	different at different points in its line of action
C.	the same at every point in its line of action
D.	minimum when it acts at the C.G. of the body
Answer» D. minimum when it acts at the C.G. of the body

Discussion

262.	For any system of coplanar forces, the condition of equilibrium is that the%!
A.	Algebraic sum of the horizontal components of all the forces should be zero
B.	Algebraic sum of the vertical components of all the forces should be zero
C.	Algebraic sum of moments of all the forces about any point should be zero
D.	All of the above
Answer» E.

Discussion

263.	A block of mass m‚Äö√á√Ö, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m‚Äö√á√á, which moves vertically downwards as shown in the below figure. The tension in the string is%!
A.	m‚Äö√á√Ö/m‚Äö√á√á
B.	m‚Äö√á√Ö. g. sin ≈í¬±
C.	m‚Äö√á√Ö.m‚Äö√á√á/m‚Äö√á√Ö + m‚Äö√á√á
D.	m‚Äö√á√Ö. m‚Äö√á√á.g (1 + sin ≈í¬±)/(m‚Äö√á√Ö + m‚Äö√á√á)
Answer» E.

Discussion

264.	When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is%!
A.	mv2
B.	mgv2
C.	0.5 mv2
D.	0.5 mgv2
Answer» D. 0.5 mgv2

Discussion

265.	The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is%!
A.	Same
B.	Double
C.	Half
D.	Four times
Answer» C. Half

Discussion

266.	Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)%!
A.	tan(≈í¬± + ≈ì√ú)/tan≈í¬±
B.	tan≈í¬±/tan (≈í¬± + ≈ì√ú)
C.	tan(≈í¬± - ≈ì√ú)/tan≈í¬±
D.	None of these
Answer» C. tan(≈í¬± - ≈ì√ú)/tan≈í¬±

Discussion

267.	The unit of moment of inertia of an area is%!
A.	kg-m2
B.	kg-m-s2
C.	kg/m2
D.	m4
Answer» E.

Discussion

268.	The slope on the road surface generally provided on the curves is known as%!
A.	Angle of friction
B.	Angle of repose
C.	Angle of banking
D.	None of these
Answer» D. None of these

Discussion

269.	The range of projectile (R) on an upward inclined plane is%!
A.	g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±
B.	2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§
C.	g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±
D.	2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§
Answer» E.

Discussion

270.	Two non-collinear parallel equal forces acting in opposite direction%!
A.	Balance each other
B.	Constitute a moment
C.	Constitute a couple
D.	Constitute a moment of couple
Answer» D. Constitute a moment of couple

Discussion

271.	In order to double the period of simple pendulum, the length of the string should be%!
A.	Halved
B.	Doubled
C.	Quadrupled
D.	None of these
Answer» D. None of these

Discussion

272.	The moment of the force ‚Äö√Ñ√≤P‚Äö√Ñ√¥ about ‚Äö√Ñ√≤O‚Äö√Ñ√¥ as shown in the below figure is%!
A.	P ‚àö√≥ OA
B.	P ‚àö√≥ OB
C.	P ‚àö√≥ OC
D.	P ‚àö√≥ AC
Answer» D. P ‚àö√≥ AC

Discussion

273.	If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is%!
A.	g/2
B.	g/3
C.	g/4
D.	None of these
Answer» E.

Discussion

274.	In order to determine the effects of a force, acting on a body, we must know%!
A.	Magnitude of the force
B.	Line of action of the force
C.	Nature of the force i.e. whether the force is push or pull
D.	All of the above
Answer» E.

Discussion

275.	Moment of inertia of a circular section about an axis perpendicular to the section is%!
A.	≈ì√Ñd3/16
B.	≈ì√Ñd3/32
C.	≈ì√Ñd4/32
D.	≈ì√Ñd4/64
Answer» D. ≈ì√Ñd4/64

Discussion

276.	*$_The slope on the road surface generally provided on the curves is known as?
A.	Angle of friction
B.	Angle of repose
C.	Angle of banking
D.	None of these
Answer» D. None of these

Discussion

277.	*$_The range of projectile (R) on an upward inclined plane is?
A.	g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±
B.	2u¬¨‚â§. sin (≈í¬± + ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§
C.	g. cos¬¨‚â§ ≈í‚â§/2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±
D.	2u¬¨‚â§. sin (≈í¬± - ≈í‚â§). cos ≈í¬±/g. cos¬¨‚â§ ≈í‚â§
Answer» E.

Discussion

278.	*$_The unit of moment of inertia of an area is?
A.	kg-m2
B.	kg-m-s2
C.	kg/m2
D.	m4
Answer» E.

Discussion

279.	*$_Two non-collinear parallel equal forces acting in opposite direction?
A.	Balance each other
B.	Constitute a moment
C.	Constitute a couple
D.	Constitute a moment of couple
Answer» D. Constitute a moment of couple

Discussion

280.	*$_Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)?
A.	tan(≈í¬± + ≈ì√ú)/tan≈í¬±
B.	tan≈í¬±/tan (≈í¬± + ≈ì√ú)
C.	tan(≈í¬± - ≈ì√ú)/tan≈í¬±
D.	None of these
Answer» C. tan(≈í¬± - ≈ì√ú)/tan≈í¬±

Discussion

281.	*$_Forces are called coplanar when all of them acting on body lie in?
A.	One point
B.	One plane
C.	Different planes
D.	Perpendicular planes
Answer» C. Different planes

Discussion

282.	*$_A machine having an efficiency greater than 50%, is known as?
A.	Reversible machine
B.	Non-reversible machine
C.	Neither reversible nor non-reversible machine
D.	Ideal machine
Answer» B. Non-reversible machine

Discussion

283.	*$_Tangent of angle of friction is equal to?
A.	Kinetic friction
B.	Limiting friction
C.	Angle of repose
D.	Coefficient of friction
Answer» E.

Discussion

284.	*$_The centre of percussion is below the centre of gravity of the body and is at a distance equal to?
A.	h/kG
B.	h2/kG
C.	kG2/h
D.	h ‚àö√≥ kG
Answer» D. h ‚àö√≥ kG

Discussion

285.	*$_Dynamic friction as compared to static friction is?
A.	Same
B.	More
C.	Less
D.	May be less of more depending on nature of surfaces and velocity
Answer» D. May be less of more depending on nature of surfaces and velocity

Discussion

286.	*$_Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is ________ than that about X-X axis.?
A.	Two times
B.	Same
C.	Half
D.	None of these
Answer» B. Same

Discussion

287.	*$_If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either?
A.	Meet in a point
B.	Be all parallel
C.	At least two of them must meet
D.	All the above are correct
Answer» E.

Discussion

288.	*$_Which of the following do not have identical dimensions??
A.	Momentum and impulse
B.	Torque and energy
C.	Torque and work
D.	Moment of a force and angular momentum
Answer» E.

Discussion

289.	*$_If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is?
A.	g/2
B.	g/3
C.	g/4
D.	None of these
Answer» E.

Discussion

290.	*$_Moment of inertia of a circular section about an axis perpendicular to the section is?
A.	≈ì√Ñd3/16
B.	≈ì√Ñd3/32
C.	≈ì√Ñd4/32
D.	≈ì√Ñd4/64
Answer» D. ≈ì√Ñd4/64

Discussion

291.	*$_In order to double the period of simple pendulum, the length of the string should be?
A.	Halved
B.	Doubled
C.	Quadrupled
D.	None of these
Answer» D. None of these

Discussion

292.	*$_In order to determine the effects of a force, acting on a body, we must know?
A.	Magnitude of the force
B.	Line of action of the force
C.	Nature of the force i.e. whether the force is push or pull
D.	All of the above
Answer» E.

Discussion

293.	*$_The moment of the force ‚Äö√Ñ√≤P‚Äö√Ñ√¥ about ‚Äö√Ñ√≤O‚Äö√Ñ√¥ as shown in the below figure is?
A.	P ‚àö√≥ OA
B.	P ‚àö√≥ OB
C.	P ‚àö√≥ OC
D.	P ‚àö√≥ AC
Answer» D. P ‚àö√≥ AC

Discussion

294.	*$_The total motion possessed by a body, is called?
A.	Impulsive force
B.	Mass
C.	Weight
D.	Momentum
Answer» E.

Discussion

295.	*$_Moment of inertia of a hollow rectangular section as shown in the below figure about X-X axis, is?
A.	(BD¬¨‚â•/12) - (bd¬¨‚â•/12)
B.	(DB¬¨‚â•/12) - (db¬¨‚â•/12)
C.	(BD¬¨‚â•/36) - (bd¬¨‚â•/36)
D.	(DB¬¨‚â•/36) - (db¬¨‚â•/36)
Answer» B. (DB¬¨‚â•/12) - (db¬¨‚â•/12)

Discussion

296.	*$_According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then?
A.	Their algebraic sum is zero
B.	Their lines of action are at equal distances
C.	The algebraic sum of their moments about any point in their plane is zero
D.	The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point
Answer» D. The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

Discussion

297.	*$_A body of mass ‚Äö√Ñ√≤m‚Äö√Ñ√¥ moving with a constant velocity ‚Äö√Ñ√≤v‚Äö√Ñ√¥ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is?
A.	v
B.	2v
C.	4v
D.	8v
Answer» C. 4v

Discussion

298.	*$_The units of moment of inertia of mass are?
A.	kg-m¬¨‚â§
B.	m¬¨‚â§/kg
C.	kg/m¬¨‚â§
D.	kg/m
Answer» B. m¬¨‚â§/kg

Discussion

299.	*$_The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as?
A.	Newton's first law of motion
B.	Newton's second law of motion
C.	Newton's third law of motion
D.	None of these
Answer» C. Newton's third law of motion

Discussion

300.	*$_The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, ≈í¬± = Angle of projection, and ≈í‚â§ = Inclination of the plane with the horizontal.)?
A.	t = g cos ≈í‚â§/2u sin (≈í¬± - ≈í‚â§)
B.	t = 2u sin (≈í¬± - ≈í‚â§)/g cos ≈í‚â§
C.	t = g cos ≈í‚â§/2u sin (≈í¬± + ≈í‚â§)
D.	t = 2u sin (≈í¬± + ≈í‚â§)/g cos ≈í‚â§
Answer» C. t = g cos ≈í‚â§/2u sin (≈í¬± + ≈í‚â§)

Discussion

Explore topic-wise MCQs in Mechanical Engineering.

The acceleration of a body sliding down an inclined surface is%!

Work done is said to be zero, when%!

In the equation of virtual work, following force is neglected%!

The product of either force of couple with the arm of the couple is called%!

The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (≈í¬±) is%!

A couple produces%!

According to principle of moments%!

The velocity ratio in case of an inclined plane inclined at angle '≈í‚àè' to the horizontal and weight being pulled up the inclined plane by vertical effort is%!

The efficiency of a lifting machine is the ratio of%!

The maximum height of a projectile on a horizontal plane, is%!

According to principle of transmissibility of forces, the effect of a force upon a body is%!

For any system of coplanar forces, the condition of equilibrium is that the%!

A block of mass m‚Äö√á√Ö, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m‚Äö√á√á, which moves vertically downwards as shown in the below figure. The tension in the string is%!

When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is%!

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is%!

Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)%!

The unit of moment of inertia of an area is%!

The slope on the road surface generally provided on the curves is known as%!

The range of projectile (R) on an upward inclined plane is%!

Two non-collinear parallel equal forces acting in opposite direction%!

In order to double the period of simple pendulum, the length of the string should be%!

The moment of the force ‚Äö√Ñ√≤P‚Äö√Ñ√¥ about ‚Äö√Ñ√≤O‚Äö√Ñ√¥ as shown in the below figure is%!

If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is%!

In order to determine the effects of a force, acting on a body, we must know%!

Moment of inertia of a circular section about an axis perpendicular to the section is%!

*$_The slope on the road surface generally provided on the curves is known as?

*$_The range of projectile (R) on an upward inclined plane is?

*$_The unit of moment of inertia of an area is?

*$_Two non-collinear parallel equal forces acting in opposite direction?

*$_Efficiency of a screw jack is given by (where ≈í¬± = Helix angle, and ≈ì√ú = Angle of friction.)?

*$_Forces are called coplanar when all of them acting on body lie in?

*$_A machine having an efficiency greater than 50%, is known as?

*$_Tangent of angle of friction is equal to?

*$_The centre of percussion is below the centre of gravity of the body and is at a distance equal to?

*$_Dynamic friction as compared to static friction is?

*$_Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is ________ than that about X-X axis.?

*$_If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either?

*$_Which of the following do not have identical dimensions??

*$_If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is?

*$_Moment of inertia of a circular section about an axis perpendicular to the section is?

*$_In order to double the period of simple pendulum, the length of the string should be?

*$_In order to determine the effects of a force, acting on a body, we must know?

*$_The moment of the force ‚Äö√Ñ√≤P‚Äö√Ñ√¥ about ‚Äö√Ñ√≤O‚Äö√Ñ√¥ as shown in the below figure is?

*$_The total motion possessed by a body, is called?

*$_Moment of inertia of a hollow rectangular section as shown in the below figure about X-X axis, is?

*$_According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then?

*$_A body of mass ‚Äö√Ñ√≤m‚Äö√Ñ√¥ moving with a constant velocity ‚Äö√Ñ√≤v‚Äö√Ñ√¥ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is?

*$_The units of moment of inertia of mass are?

*$_The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as?

*$_The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, ≈í¬± = Angle of projection, and ≈í‚â§ = Inclination of the plane with the horizontal.)?