4. A 5.0 kg block slides along a track as shown in the figure. It starts at rest from point A, hi = 7.0 m above the floor. (a) Use conservation of energy to find the speed of the block at point B if the track is frictionless (b) Suppose the track is not frictionless and block's speed at point B is 9.5 m/s. How much work is done by the friction force when the block reaches point B? (c) What is the speed of the block at point C, h2 3.0 m above the floor (assume track is frictionless)

4. A 5.0 kg block slides along a track as shown in the figure. It starts at rest from point A, hi = 7.0 m above the floor. (a) Use conservation of energy to find the speed of the block at point B if the track is frictionless (b) Suppose the track is not frictionless and block's speed at point B is 9.5 m/s. How much work is done by the friction force when the block reaches point B? (c) What is the speed of the block at point C, h2 3.0 m above the floor (assume track is frictionless)

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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Question

4. A 5.0 kg block slides along a track as shown in the figure. It starts at rest from point A, hi = 7.0 m above the floor.
(a) Use conservation of energy to find the speed of the block at point B if the track is
frictionless
(b) Suppose the track is not frictionless and block's speed at point B is 9.5 m/s.
How much work is done by the friction force when the block reaches point B?
(c) What is the speed of the block at point C, h2 3.0 m above the floor (assume track is
frictionless)

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