A box m40kg initially at rest on a flat floor the, Ask an Expert

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A box (m=40kg) initially at rest on a flat floor. The coefficient of KE between the box and the floor is μ_k= 0.60a. A woman pushes horizontally against the box with a force of 250 N until the box attains a speed of 2 m/s.

A. What is the change in KE of the box?
B. What is the work done by the friction force on the box?
C. What is the work done by the woman on the box?

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