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Questions 8-10 don't have to go into detail just the steps how to solve thank you! 8. A shopper at the Fries' market place pushes
Questions 8-10 don't have to go into detail just the steps how to solve thank you!
8. A shopper at the Fries' market place pushes a 13.0-kg shopping cart at a constant velocity for a distance of 58.7 m on a level surface. He pushes in a direction 24.5 below the horizontal. A 53.8 N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts on the cart? (b) What is the work done by the pushing force? (c) What is the work done by the frictional force? (d) What is the work done by the gravitational force? 9. A 3.59 X 102-N force is used to pull a 95.0-kg refrigerator across a horizontal surface. The force acts at an angle of 23.5 above the horizontal surface. The coefficient of kinetic friction is 0.289, and the refrigerator moves a distance of 12.3 m. (a) What is the work done by the pulling force? (b) What is the work done by the kinetic frictional force? 10. A 2.98 X 102-kg crate is being pulled across a horizontal surface by a force F which makes an angle of 35.90 above the horizontal. Suppose that the coefficient of kinetic friction is 0.222, what should the magnitude of F be so that the net work done by it and the kinetic frictional force is zero?
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