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)
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Conservation Of Energy
Section: Chapter Questions
Problem 23P
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