Question

A 68.5-kg astronaut is doing a repair in space on the orbiting space station. She throws a 2.25-𝑘𝑔 tool away from her at 3.20 𝑚/𝑠 relative to the space station. With what speed and in what direction will she begin to move?

Answer 1

$$u=\frac{vm}{M}=\frac{3.2·2.25}{68.5}=0.105\text{ m/s}.$$