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jmattsen
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Homework Statement
An astronaut with a mass of 90 kg (including spacesuit and equipment) is drifting away from his spaceship at a speed of 0.20 m/s with respect to the spaceship. The astronaut is equipped only with a 0.50-kg wrench to help him get back to the ship.
Homework Equations
conservation of momentum m1*v1=m2*v1
The Attempt at a Solution
unfortunately i really have no good an attempt. i know that the Δv has to = 0.1
and that the wrench has to exert a force on the astronaut in the opposite direction he is traveling but what i do not get is how the conservation of momentum equation is used since all the variables are known? (90kg+.5kg)(.2m/s)=(90ks)(.1m/s)
i feel like i should be using the equation F=m*Δv/t since i need to get a Δv in it somewhere but beyond that i am stumped