Momentum

Total momentum within a closed system is 

A. increasing 

B. decreasing 

C. zero 

D. constant

If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is 

A. elastic 

B. inelastic 

C. conserved 

D. not conserved

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

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

Mass and velocity are combined to give 

A. angular momentum 

B. equilibrium 

C. acceleration 

D. linear momentum

Momentum of electron having mass 9.1 × 10^-31 kg and velocity 2.0 × 10⁷ is 

A. 1.91 × 10^-23 

B. 2.34 × 10^-23 

C. 3.11 × 10^-19 

D. 7.88 × 10^-34

If a trolley collides with a stationary trolley of double mass, then they move off with 

A. half of the original velocity 

B. one third of original velocity 

C. double the original velocity 

D. triple the original velocity

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 perfectly inelastic collision, kinetic energy 

A. totally disappears 

B. is increased 

C. is decreased 

D. is unchanged 

Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s^-1 is 

A. 2.4 × 10^-22 m s^-1 

B. 3.5 × 10^-33 m s^-1 

C. −2.0 × 10^-22 m s^-1 

D. −3 × 10³⁴ m s^-1