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vampirchik [111]
3 years ago
14

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of f

riction between the box and the floor is μ. At what rate does the child do work on the box?
Physics
1 answer:
dexar [7]3 years ago
4 0

Answer:

Explanation:

Given

mass of box is m

speed of box is v

coefficient of friction \mu =\frac{1}{4}=0.25

Box is moving at a constant speed i.e. Net Force on box is zero

i.e. Frictional Force and Force Applied are Equal

F=f_r=\mu mg

The Rate at which power is generated is

P=F\cdot v

P=\mu mg\cdot v

P=0.25mgv

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