Chapter 7 Problem Set (Draw labeled free-body diagram in each item then calculate) 1. To get a cart to move, two farmers pull on ropes attached to the cart. One farmer pulls with a force of 50 N in a direction 35 degrees east of north, while the other exerts a force of 30 N in a direction 25 degrees west of north. What is the magnitude and the direction of the combined force exerted on the cart? 2. Two objects are connected by a string passing over a frictionless, massless pulley. The block is on an inclined plane, 35 degrees from the horizontal, and the ball is hanging over the top edge of the plane. The block has a mass of 60 kg, and the coefficient of kinetic friction between the block and the inclined plane is 0.22. If the block moves at a constant speed down the incline, and the ball rises at a constant speed, what is the mass of the hanging ball? 3. A 10 kg box is pulled along a horizontal surface by a force Fp of 40 N applied at a 30 degrees angle. If the coefficient of kinetic friction is 0.30, what is the
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This note was uploaded on 07/13/2011 for the course PHYS 2287 taught by Professor Jamesinstor during the Spring '11 term at University of Massachusetts Boston.