90 N F Example 4.1 30° 30 kg A person pulls a 30 kg crate 10 m across a level floor using a rope that is 30° above horizontal. The person exerts a force of 90 N on the rope. (a) How much work is done by the person? (b) If the coefficient of friction between the crate and the floor is 0.1, how much work is done by the friction? (c) What is the work done by the gravitational force? (d) What is the net work done on the crate?

90 N F Example 4.1 30° 30 kg A person pulls a 30 kg crate 10 m across a level floor using a rope that is 30° above horizontal. The person exerts a force of 90 N on the rope. (a) How much work is done by the person? (b) If the coefficient of friction between the crate and the floor is 0.1, how much work is done by the friction? (c) What is the work done by the gravitational force? (d) What is the net work done on the crate?

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Description: 90 NFExample 4.130°30 kgA person pulls a 30 kg crate 10 m across a level floor using a ropethat is 30° above horizontal. The person exerts a force of 90 N onthe rope.(a) How much work is done by the person?(b) If the coefficient of friction between

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Part A A 1680 kg car skids on a level road with coefficient of kinetic friction 0.64 between the tires of the car and the road. The car skids a distance of 102 m and comes to a complete stop. The work done on the car by the force of kinetic friction is (enter your answer with two significant figures) possibly useful: W = (Fcose)d w = mg 9 = 9.81 m/s? VAZ中 ? J Submit Request Answer Part B The amount of thermal energy generated while the car was skidding is (enter your answer with two significant figures) AL中 ? J Submit Request Answer
QUESTION 5 If an object is confined to move along some surface, the normal force from the surface does work on the object. True False
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PRINTER VERSION 1 BACK NEXT Chapter 08, Problem 045 A rope is used to pull a 5.52 kg block at constant speed 4.57 m along a horizontal floor. The force on the block from the rope is 7.54 N and directed 31.6° above the horizontal. What are (a) the work done by the rope's force, (b) the increase in thermal energy of the block-floor system, and (c) the coefficient of kinetic friction between the block and floor? (a) Number Units (b) Number Units (c) Number Units LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM Question Attempts: 0 of 5 used SAVE FOR LATER SUBMIT ANSWER