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WolfpackPride
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Homework Statement
A crate with a mass of 120 kg glides through a space station with a speed of 2.5 m/s. An astronaut speeds it up by pushing on it from behind with a force of 250 N, continually pushing with this force through a distance of 5 m. The astronaut moves around to the front of the crate and slows the crate down by pushing backwards with a force of 220 N, backing up through a distance of 4 m.
What is the total amount of work done by the astronaut in these two maneuvers? (I correctly calculated this to be W = 370J)
After these two maneuvers, what is the speed of the crate?
Homework Equations
Kf - Ki = work
The Attempt at a Solution
I found the work, but need the speed. I just can't figure out how to pull the velocity out of that correctly