An 80 kg spacewalking astronaut pushes off a 640 kg, Ask an Expert

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Q. An 80 kg spacewalking astronaut pushes off a 640 kg satellite, exerting a 100N force for the 0.50 s it takes him to straighten his arms.

How far apart are the astronaut and the satellite after 1 minute?

Q. Three equal point charges, each with charge 1.00 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.550 m. What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)

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Category:- Physics
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