Question

An astronaut with a mass of `100 kg` is floating in space. If the astronaut throws an object with a mass of `2 kg` at a speed of `11/9 m/s`, how much will his speed change by?

Answer 1

`Delta v=-0,0249 m/s`

Explanation:

`P_b=0; " total momentums before event"`
`P_a,P_o:" astronaut and object's momentums after event"`
`0=P_a+P_o`
`0=98*v_a+2*11/9`
`22/9=-98*v_a`
`v_a=-22/(9*98)`
`v_a=-0,0249 m/s`
`Delta v=-0,0249-0`
`Delta v=-0,0249 m/s`