A body of mass M while falling vertically downwards under gravity breaks into two parts, a body B of mass 1/3 M and body C of mass 2/3 M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards ___________

Depends on the height of braking

The direction of angular velocity vector is along ___________

The tangent to the circular path

Both statement 1 and 2 are true and statement2 is the correct explanation of statement 1

Both statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1

Statement 1 is true but statement 2 is false

Both statement 1 and 2 are true and statement2 is the correct explanation of the statement1

Both statement 1 and 2 are true but statement 2 is not the correct explanation of the statement1

Statement 1 is true but statement 2 is false

Line joining centres of any two balls

Point of intersection of the medians

Help in overcoming the dead point

1.	The instantaneous acceleration of the point of contact during rolling is zero.
A.	True
B.	False
Answer» C.

2.	A body of mass M while falling vertically downwards under gravity breaks into two parts, a body B of mass 1/3 M and body C of mass 2/3 M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards ___________
A.	Body C
B.	Body B
C.	Depends on the height of braking
D.	Does not shift
Answer» E.

3.	The motion of planets in the solar system is an example of the conservation of ___________
A.	Mass
B.	Linear momentum
C.	Angular momentum
D.	Energy
Answer» B. Linear momentum

4.	The direction of angular velocity vector is along ___________
A.	The tangent to the circular path
B.	The inward radius
C.	The outward radius
D.	The axis of rotation
Answer» E.

5.	Statement 1: If ice caps of the pole melt, the day length will shorten. Statement 2: Ice flows towards the equator and decreases the moment of inertia of the earth and hence increases the frequency of rotation of the earth.
A.	Both statement 1 and 2 are true and statement2 is the correct explanation of statement 1
B.	Both statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1
C.	Statement 1 is true but statement 2 is false
D.	Statement 1 and 2 are false
Answer» E.

6.	Statement 1: The earth is slowing down and as a result, the moon is coming nearer to it. Statement 2: The angular momentum of the earth-moon system is not conserved.
A.	Both statement 1 and 2 are true and statement2 is the correct explanation of the statement1
B.	Both statement 1 and 2 are true but statement 2 is not the correct explanation of the statement1
C.	Statement 1 is true but statement 2 is false
D.	Statement 1 and 2 are false
Answer» E.

7.	Three identical metal balls, each of the radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centres of three balls are joined. The centre of the mass of the system is located at ___________
A.	Line joining centres of any two balls
B.	Centre of one of the balls
C.	Horizontal surface
D.	Point of intersection of the medians
Answer» E.

8.	A flywheel is attached to an engine to ___________
A.	Increase its speed
B.	Decrease its speed
C.	Help in overcoming the dead point
D.	Decrease its energy
Answer» D. Decrease its energy

9.	Two racing cars of masses m₁ and m₂ are moving in circles of radii r₁ and r₂ respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first two to the second car will be ____________
A.	1:1
B.	r<sub>1</sub>:r<sub>2</sub>
C.	m<sub>1</sub>:m<sub>2</sub>
D.	m<sub>1</sub> m<sub>2</sub>:r<sub>1</sub> r<sub>2</sub>
Answer» B. r<sub>1</sub>:r<sub>2</sub>