An astronaut of 100 kg at 100 meters from his spaceship finds himself

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An astronaut of 100 kg at 100 meters from his spaceship finds himself hopelessly drifting away at a speed of 6.06 m/s, he decides to throw a heavy wrench (10 kg) to rescue himself. With what speed (relative to himself) does he need to throw the wrench in order to slow down by 20% of the initial drifting speed (albeit still drifting away)? Note: world record of baseball pitch is over fifty meter per second. Before mA = 100 kg mW = 10 kg

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Before

\begin{array}{l} m_{A} = 100 k g \\ m_{W} = 10 k g \end{array}

An astronaut of

100 k g

at 100 meters from his spaceship finds himself hopelessly drifting away at a speed of

6.06 m / s

, he decides to throw a heavy wrench (

10 k g

) to rescue himself. With what speed (relative to himself) does he need to throw the wrench in order to slow down by

20 %

of the initial drifting speed (albeit still drifting away)? Note: world record of baseball pitch is over fifty meter per second.

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