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Physics question HELP?

A 84.7 kg astronaut is working on the en-

gines of a spaceship that is drifting through

space with a constant velocity. The astronaut

turns away to look at Earth and several sec-

onds later is 34.0 m behind the ship, at rest

relative to the spaceship. The only way to re-

turn to the ship without a thruster is to throw

a wrench directly away from the ship. The

wrench has a mass of 0.450 kg, and the astro-

naut throws the wrench with a speed of 24.6


How long does it take the astronaut to reach

the ship?

Answer in units of s.

Answers (2)

fivmjjwvaa profile image
zjkm43giaa profile image

this problem requires equations relating to the conservation of momentum.

M1 x V1 = M2 x V2

84.7 x V1 = 0.45 x 24.6

84.7 x V1 = 11.07

V1 = 0.1307 m/s

34 / 0.1307 = 260.14 seconds