A 90 kg astronaut is stranded in space at a point
A 90-kg astronaut is stranded in space at a point 6.0 m from his spaceship, and he needs to get back in 4.0 min to control the spaceship. To get back, he throws a 0.50-kg piece of equipment so that it moves at a speed of directly away from the spaceship.
(a) Does he get back in time?
(b) How fast must he throw the piece of equipment so he gets back in time?
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