patmatt34 patmatt34

02-06-2017
Physics

contestada

On a small planet, an astronaut uses a vertical force of 175 newtons to lift an 87.5 kilogram boulder at constant velocity to a height of .35 meter above the planet's surface. What is the magnitude of the gravitational field strength on the surface of the planet

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anonymous79 anonymous79

02-06-2017

P. E. = mgh = 175N*.35m=61.25J
constant velocity means no acceleration ie the force exerted is not net force

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