A particle of mass m moving with velocity v collides with a

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

151.

A long block A of mass M is at rest on a smooth horizontal surface.  A small block B of mass M/2 is placed on A at one end and projected along A with same velocity v. The coefficient of friction between the block is μ. Then the acceleration of blocks A and B before reaching a common velocity will be respectively

  • μg2 (towards right), μg2 (towards left)

  • μg (towards right), μg (towards left)

  • ug2 (towards right), μg (towards left)

  • μg (towards right), μg2 (towards left)


152.

A car of mass 1000 kg moves on a circular track of radius 20 m. If the coefficient of friction of 0.64. The maximum velocity with which the car can be moved is

  • 11.2m/s

  • 112m/s

  • 0.64×201000×100m/s

  • 100064×20m/s


153.

The angle through which a cyclist bends when he covers a circular path of 34.3 m circumference in 22 sec is (g=9.8 m/s)

  • 150

  • 300

  • 600

  • 450


154.

A body of mass 0.1 kg attains a velocity of 10 ms' in 0.1 sec. The force acting on the body is

  • 10N

  • 0.01N

  • 0.1N

  • 100N


Advertisement
155.

A body is moving in a circular path with acceleration 'a'. If its velocity gets doubled, find the ratio of acceleration after and before the change 

  • 1:4

  • 14:1

  • 2:1

  • 4:1


Advertisement

156.

A particle of mass m moving with velocity v collides with a stationary particle of mass 2m. The speed of the system, will be

  • 3v

  • v2

  • v3

  • 2v


C.

v3

According to conservation of momentum

change in moment is eual to final momentum

m1v1+m2v2= (m1+m2)v'

mv+2m×0= (m+2m)v'

so,   v'=v3


Advertisement
157.

A cone filled with water is revolved in a vertical circle of radius 4 m and the water does not fall down. What must be the maximum period of revolution?

  • 2 s

  • 4 s

  • 1 s

  • 6 s


158.

Which is true for rolling frictrion   μr , static friction μs  and  kinetic friction  μk :

  • μs > μk >  μr

  • μs <  μk <  μr

  • μs <  μk >  μr

  • μs > μr  > μk


Advertisement
159.

Two weights w1 and w2 are suspended to the two strings on a frictionless pulley. When the pulley is pulled up with an acceleration g, then the tension in the string is :


160.

A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms'.The kinetic energy of the other mass is

  • 256 J

  • 486 J

  • 524 J

  • 324 J


Advertisement