The ratio of the restitution impulse to the deformation impulse is called ___ a)

Question

The ratio of the restitution impulse to the deformation impulse is called ___ a) restitution coefficient. b) energy ratio c) restitution-impulse ratio. d) mechanical efficiency. Two balls impact with a coefficient of restitution of 0.79. Can one of the balls leave the impact with a kinetic energy less than before the impact? a) No b) Yes c) Impossible to tell d) All of the above Under what condition is the energy lost during a collision minimum? a) e = 1.0 b) e = 0.0 c) e = -1.0 d) Collision is non-elastic. Block B(1 kg) is moving on the smooth surface at 10 m/s when it squarely strikes block A(3 kg), which is at rest. If the velocity of block B after the collision is 4 m/s to the right, (V_A)_2 is a) 2 m/s rightarrow b) 7 m/s leftarrow c) 7 m/s rightarrow d) 2 m/s leftarrow A particle strikes the smooth surface with a velocity of 30 m/s. If e = 0.8, (v_x)_2 is less than (v_x)_1 after the collision because of a) gain in kinetic energy b) energy loss c) gravity d) centripetal acceleration The internal impulses acting on a system of particles always ___ a) equal the external impulses b) equal the impulse of weight. c) sum to zero. d) None of the above.

Explanation / Answer

17) Option A

Coefficient of Restitution: The ratio between the restorative impulse and the deformation impulse

18) Yes.

Velocity of one of the balls decreases and hence kinetic energy decreases.

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