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Question

A woman pushes 7.0 kg box across a horizontal floor, applying a horizontal force of 25 Newtons. The only other horizontal force acting on the box is an 18 Newton force of friction. What is the acceleration of the box while the woman pushes?

A
3.6m/s2
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B
2.6m/s2
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C
1.0m/s2
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D
49m/s2
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E
175m/s2
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Solution

The correct option is C 1.0m/s2
Given : F=25 N f=18 N m=7kg
Acceleration of the box a=Ffm=25187=1.0 m/s2

531216_492382_ans_db0165c7fe044c6882fa719a0e87b6a5.png

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