In deep space two spaceships moving at constant but different velocities observe

Question

In deep space two spaceships moving at constant but different velocities observe a collision between two asteroids that is NOT perfectly elastic. Which of the following BEST describes the observations of each? A. Both agree that linear momentum and kinetic energy are conserved through the collision. B. Both agree that linear and angular momentum are conserved through the collision, but disagree about the change in kinetic energy. C. Both agree that only angular momentum is conserved through the collision. D. Both agree that linear and angular momentum are conserved through the collision. They also agree about the change in kinetic energy. E. Neither agrees that linear momentum is conserved through the collision.

Explanation / Answer

Since both observer are moving with constant velocity, they belong to inertial observer. So both will agree upon the conservation of linear and angular momentum. Since collision is not perfectly elastic, so kinetic energy is not conserved. Hence both will agree about the change of kinetic energy.

Most matched answer will be D

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