3. The uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us =0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is µ's =0.45. Assume the man exerts only a horizontal force on the crate. 2.4 m 1.6 m 2 m

3. The uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us =0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is µ's =0.45. Assume the man exerts only a horizontal force on the crate. 2.4 m 1.6 m 2 m

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Description: 3. The uniform crate has a mass of 150 kg. If the coefficient of static friction between thecrate and the floor is us =0.2, determine the smallest mass of the man so he can move thecrate. The coefficient of static friction between his shoes and the

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter5: Further Applications Of Newton's Laws: Friction, Drag, And Elasticity

Section: Chapter Questions

Problem 1PE: A physics major is cooking breakfast when he notices that the frictional force between his steel...

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A physics major is cooking breakfast when he notices that the frictional force between his steel spatula and his Teflon frying pan is only 0.200 N. Knowing the coefficient of kinetic friction between the two materials, he quickly calculates the normal force. What is it?
8. A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley may be considered frictionless. The coeffi- cient of static friction between the block and the plane is us; and the coefficient of kinetic friction is k 0 A. g D. g - Hk sin(0) m a. What is the magnitude of the static frictional force acting on the block? B.m g [1 - sin(0)] C. mg D. mg cos(0) B. g - Hk cos(0) A. m g sin(0) E. mg [1 - cos(0)] b. If the rope were cut between the block and the pulley, what would be the magnitude of the acceleration of the block down the plane? C. g [sin(0) - μ cos(0)] sin(0)] c. If the mass of the suspended object is doubled, what will be the acceleration of the block up the plane? B. g [2 tan(0) - uk sin(0)] D. 2g [μ sin(0) - cos(0)] m E. g [tan (0) A. g [2 - μk sin(0)] C. g [2 cos(0) - μ sin(0)] E. g [2 sin(0) Hk Cos (0)]. -
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