7.A 4-N force is applied to a 2-kg object that is moving at 3 m/s. Thisforce is parallel to the object's velocity. After the object has travelledan additional 5 m, the force is removed. The work done by this forceis:А. 12)В. 15)С. 18)D. 20J8.A dog team exerts a horizontal force to a sledge weighing 5000 Nincluding load. It is pulled on level snow with a coefficient of kineticfriction of 0.05. How much work is done by the dog team pulling thesledge 1000 m at constant speed?A. 2.5 X 104 JВ. 2.5 X 105 JC. 2.5 X 10° JD. 2.5 X 107J9.A man pushes an 80-N crate up a frictionless slope that makes anangle of 30° with the horizontal. The man was able to push it to adistance of 5.0m along the slope with a force parallel also to theslope. However the speed of the crate decreases at a rate of 1.5 m/s?.The work being done by the man is:A. -200 JВ. 61 JC. 140 JD. 200 J

Work done = Force × displacement

Answered: A 4-N force is applied to a 2-kg object…

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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A 4-N force is applied to a 2-kg object that is moving at 3 m/s. This force is parallel to the object's velocity. After the object has travelled an additional 5 m, the force is removed. The work done by this force is: А. 12] В. 15) С. 18) D. 20J 8.