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Potential Energy of an Object at a Height

A person exer...

Question

A person exerts a horizontal force of 500 N on a box, which also experiences a frictional force of 100 N.
How much work is done against friction when the box moves a horizontal distance of 3 m?

A

300 J

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B

1200 J

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C

1500 J

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D

1800 J

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Solution

The correct option is A 300 J
$W = F \times D$
$= 100 \times 3 = 300 J$
Hence, work done against friction when the box moves a horizontal distance of 3m is 300J.

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