Momentum

In a perfectly elastic collision, the relative speed of approach and relative speed of separation are 

A. equal 

B. in equal 

C. zero 

D. infinite

Force exerted by bat on ball if it strikes a ball of mass 0.16 kg initially hits bat with speed of 25 m s^-1 with time impact of 0.003 s is 

A. 145 N 

B. 1333.33 N 

C. 1456.7 N 

D. 6543 N

In a springy collision, if the fast moving trolley collides with a slow one, then the fast one will bounce back at speed of 

A. slow one 

B. less than slow one 

C. more than slow one 

D. with the same speed as before

An object travelling with constant velocity has 

A. constant momentum 

B. zero momentum 

C. increasing momentum 

D. decreasing momentum

Direction of momentum is direction of object’s 

A. mass 

B. acceleration 

C. velocity 

D. frictional force

Mass and velocity are combined to give 

A. angular momentum 

B. equilibrium 

C. acceleration 

D. linear momentum

In a perfectly inelastic collision, kinetic energy 

A. totally disappears 

B. is increased 

C. is decreased 

D. is unchanged 

To replace a ball with another ball by collision, a snooker player must consider the condition that 

A. the collision must be head on 

B. The moving ball must not be given any spin 

C. both A and B 

D. no conditions required

A white ball of mass 1.0 kg moving with initial speed u = 0.5 m s -1 collides with stationary red ball of same mass, they move forward making angle of 90° between their paths. Their speed is 

A. 1 m s^-1 

B. 0.354 m s^-1 

C. 2 m s^-1 

D. 3 m s^-1

Resultant force acting on object and rate of change of linear momentum are 

A. inversely related 

B. not related at all 

C. directly related 

D. directly proportional