A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so that its centre if mass has a speed of 20cm/s. How much work has to be done to stop it?

A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so

1.	A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so that its centre if mass has a speed of 20cm/s. How much work has to be done to stop it?
A.	5 J
B.	6 J
C.	2 J
D.	4 J
Answer» E.

Discussion

No Comment Found

Related MCQs

One solid sphere ‘A’ and another hollow sphere ‘B’ are of same mass and same outer radii. Their moments of inertia about their diameters are respectively IA and IB, such that _____________
Moment of inertia of a circular wire of mass M and radius R about its diameter is _____________
A smooth sphere A is moving on a frictionless horizontal plane with angular speed ω and the centre of mass velocity u. It collides elastically and head on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ω(A) and ω(B) respectively. Then?
Two particles A and B, initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, what is the speed of mass of the system?
A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination. In each case, the ball will _____________
A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination. In each case, the ball will reach the bottom _____________
ONE_SOLID_SPHERE_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ‚Â§A‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_AND_ANOTHER_HOLLOW_SPHERE_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ‚Â§B‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_ARE_OF_SAME_MASS_AND_SAME_OUTER_RADII._THEIR_MOMENTS_OF_INERTIA_ABOUT_THEIR_DIAMETERS_ARE_RESPECTIVELY_IA_AND_IB,_SUCH_THAT?$#
MOMENT_OF_INERTIA_OF_A_CIRCULAR_WIRE_OF_MASS_M_AND_RADIUS_R_ABOUT_ITS_DIAMETER_IS?$
A smooth sphere A is moving on a frictionless horizontal plane with angular speed ‚âà√¨‚àö¬¢ and the centre of mass velocity u. It collides elastically and head on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ‚âà√¨‚àö¬¢(A) and ‚âà√¨‚àö¬¢(B) respectively. Then?#
Two particles A and B, initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of mass of the system is

A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so that its centre if mass has a speed of 20cm/s. How much work has to be done to stop it?

Discussion

No Comment Found

Related MCQs

Reply to Comment