A 70 kg astronaut throws a 5 kg ball with a velocity of 20 m/s east. What is the velocity of the astronaut?

Explanation:

From the question we are told that

70 kg astronaut

5 kg ball

A velocity of 20 m/s east

Generally with Law of conservation of momentum in place for a body in space

initial and final momentum must be equal

Therefore

Mathematically solving for

Therefore the Astronauts velocity relative to his mass is given to be

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

the answer is a. hope this .