Question

A girl pushes her little brother on his sled with a force of 300 N for 750 m. How much work is this

if the force of friction acting on the sled is:
a. 200 N?
b. 300 N?

Answer 1

The work done against friction can be calculated by multiplying the force of friction by the displacement.

Step-by-step explanation:

Work is defined as the product of force and displacement. In this case, the girl is applying a force of 300 N on the sled and pushing it for a distance of 750 m.

a. If the force of friction acting on the sled is 200 N, then the work done against friction can be calculated by multiplying the force of friction by the displacement: Work = Force x Distance = 200 N x 750 m = 150,000 J.

b. If the force of friction acting on the sled is 300 N, then the work done against friction can be calculated in the same way: Work = Force x Distance = 300 N x 750 m = 225,000 J.

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