Question

A person pushes a refrigerator weighing 720 N across a floor 12 m at a constant speed.
a) What is the work done by the person?

b) What is the work done by the force of gravity on the refrigerator?
c) What is the work done by friction? (The force of friction between the refrigerator and the floor is 480 N.)

Answer 1

Answer:

2880 J

Explanation:

because of frection

720N-480N=240N

therefore work done = force*displacement

=240*12

=2880J.

so,total work done =2880J

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