madisong57 madisong57

Today at 4:42 AM
Physics

Answered

A 49 Newton rock is lifted 2 meters in 5 seconds.
How much work is done?
What power is used?

Answer :

olemakpadu olemakpadu

Today at 4:47 AM

Work done is potential energy = mgh

mg = weight of the stone = 49 N

h = 5 m

Work done = (mg)h = 49 * 5 = 245 Joules.

Power = Work done / Time taken

= 245 / 5 = 49 Watts.

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