While in space far from any gravitational body, a 120-kg astronaut pushes off a 2400 kg space vehicle. The contact lasts .25 seconds, after which the astronaut is traveling 1 m/s a) what's the magnitude of the pushing force?  b) what's the speed of the vehicle after the contact has ended? c) how is Newton's 3rd law demonstrated?

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Chapter4: Dynamics: Force And Newton's Laws Of Motion
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Problem 23PE: A 5.00105 -kg rocket is accelerating straight up. Its engines produce 1.250107 N of thrust, and air...
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While in space far from any gravitational body, a 120-kg astronaut pushes off a 2400 kg space vehicle. The contact lasts .25 seconds, after which the astronaut is traveling 1 m/s

a) what's the magnitude of the pushing force? 

b) what's the speed of the vehicle after the contact has ended?

c) how is Newton's 3rd law demonstrated?

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