The astronaut would go the opposite direction due to Newton’s third law of -10N, -10N, -9N, -9N
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Explanation:
The horsepower (hp) is a unit in the foot-pound-second ( fps ) or English system, sometimes used to express the rate at which mechanical energy is expended. It was originally defined as 550 foot-pounds per second (ft-lb/s). A power level of 1 hp is approximately equivalent to 746 watt s (W) or 0.746 kilowatt s (kW).
Acceleration due to gravity will be constant, but the speed can change.