FRICTION PROBS

# FRICTION PROBS - friction that Joe encounters B If the...

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FRICTION PROBLEMS 1. Brian is walking into Physics class but does not realize, Mary has split some of her Latte. As Brian is 42 kg, steps in the spill and starts to slide. If the coefficient of kinetic friction is 0.040, what is the force of friction between the floor and Brian? 2. While redecorating her apartment, Kaylee pushes an 82 kg cabinet across the wooden floor, which resists the motion with a force of 320 N. What is static coefficient of friction? 3. At sea world a 900 kg polar bear slides done a wet slide at an angle of 25 ° from the horizontal. The coefficient of friction between the bear and the slide is 0.052. What is the force that impedes the bear’s motion? 4. Rather than take the stairs, Joe gets from the second floor of the Frat House to the first floor, by sliding down the banister that is at an angle of 30° from the horizontal. A) If Joe has a mass of 45 kg and the coefficient of static friction is 0.20, what is the force of
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Unformatted text preview: friction that Joe encounters? B) If the banister‘s angle increases, how does this affect the force of friction? If so what? 5. As Jane is taking a shower, she spills shampoo on the floor and she steps on the shampoo with a force of 550 N. What is the frictional force between her foot and the film if the coefficient of friction is .09? 6. In her Physics lab, Eliza puts a 1 kg mass on a 3 kg block of wood. She pulls the combination across another wooden surface with a constant speed to determine the coefficient kinetic friction between the surfaces. If her pull requires a pull of 7.3 N, what does she calculate for a value of μ? 7. A chunk of rock of mass 50 kg slides down the side of a volcano that slopes up from sea level of 30°. If the rock accelerates at a rate of 3.0 m/s 2 , what is the coefficient of kinetic friction between the rock and the side of the volcano?...
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