Question

An astronaut with a mass of `95 kg` is floating in space. If the astronaut throws an object with a mass of `3 kg` at a speed of `1/8 m/s`, how much will his speed change by?

Answer 1

`0.395cms^-1` in the opposite direction.

Explanation:

According to law of momentum,
`95v+(3×1/8)=(3+95)×0`
`=>v=-3/(8×95)`
`=>v=-(3/760)`

V=`(3/760)ms^-1` or `0.395cms^-1`