Learning Goal: To practice Problem-Solving Strategy 5.1 Newton\'s First Law: Equ

Question

Learning Goal: To practice Problem-Solving Strategy 5.1 Newton's First Law: Equilibrium of a Particle. Suppose that you want to move a heavy box with mass 30.0 kg across a carpeted floor. You try pushing hard on one of the edges, but the box does not move. Suppose that you are pushing against the box from an angle 30.0degree above horizontal with a force of magnitude 240 N. What is the magnitude of the friction force acting on the box? Find the magnitude n of the normal force. Express your answer in newtons to three significant figures.

Explanation / Answer

N = mg + 240sin30

= 30 x9.8 + 240sin30 =414 N

friction force = 240cos30 = 207.85 N

N = mg + 240sin30

= 30 x9.8 + 240sin30 =414 N

friction force = 240cos30 = 207.85 N

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