# AP Physics

posted by Anna

A large box has a mass of 500kg and the coefficient of static friction for the box and the floor is 0.45, and the coefficient of kinetic friction is 0.30.

a. What is the minimum horizontal force needed to get the box moving?

b. If you continue to push with that force, what will the acceleration of the box be?

1. bobpursley

a. .45*mg
b. .45*mg-.30mg=ma
a= .15g

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