# physics

A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?
37.9 newtons
32.1 newtons
33.1 newtons
35.0 newtons
50.5 newtons

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asked by Dalton
1. It has to be 37.9 or 32.1

The others are wrong I think.

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posted by Gavin
2. The net horizontal force is 35 -2.9 = 32.1 N

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posted by Damon
3. i have no clue

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