Part A to B A.) If the coefficient of kinetic friction between a 22 kgkg crate and the floor is 0.32, what horizontal force is required to move the crate at a steady speed across the floor? Express your answer to two significant figures and include the appropriate units. F= __________ ___________ B.) What horizontal force is required if μkμk is zero? Express your answer to two significant figures and include the appropriate units. F= ___________ __________

Part A to B A.) If the coefficient of kinetic friction between a 22 kgkg crate and the floor is 0.32, what horizontal force is required to move the crate at a steady speed across the floor? Express your answer to two significant figures and include the appropriate units. F= ____ _ B.) What horizontal force is required if μkμk is zero? Express your answer to two significant figures and include the appropriate units. F= _ ____

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter4: Forces In One Dimension

Section4.2: Weight And Drag Force

Problem 21PP

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Q1: Is the force of static friction constant as the incline rises? Explain your answer. Q2: If Mr. Einstein now wears ankle weights while sliding down, would the kinetic frictional force he experiences be the same, less, or greater than he experienced before? Would he accelerate faster? Would the coefficient of kinetic friction change? Please do not copy the answer from other source
A 1,500-N crate is being pushed across a level floor at a constant speed by a force F of 370 N at an angle of 20.0° below the horizontal, as shown in figure a below. (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 370-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).
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