A satellite with a rest mass of 200 kg and a speed of 0.800c and a second satellite with a rest mass of 100 kg and a speed of 0.600c are traveling toward each other in deep space.The satellites collide and somehow manage to stick together.What is the rest mass of the combined object after the collision?
A)300 kg
B)389 kg
C)416 kg
D)457 kg
E)587 kg

Question

Quizplus · Accepted Answer

The correct answer is C.The rest mass of the combined object after the collision is 416 kg. This is because the rest mass of an object is invariant, meaning that it does not change with its velocity. The total rest mass of the two satellites before the collision is 200 kg + 100 kg = 300 kg. After the collision, the two satellites stick together and their rest masses add together to give a total rest mass of 416 kg.

A Satellite with a Rest Mass of 200 Kg and a Speed