3. A 1.4 kg block on a horizontal surface is pulled by a horizontal applied force. It takes 5.5 N to start the block moving and 4.1 N to keep it moving at a constant velocity. T (a) Calculate the coefficients of friction. (b) Which changes below will affect the coefficients of friction? Explain. (i) turning the block onto another side (ii) changing the surface (iii) putting an object on top of the block (c) What effect will each situation have on the static and kinetic friction acting on each object? Explain. (i) putting an object on the block (ii) applying an upward force on the block (iii) putting slippery grease on the surface

3. A 1.4 kg block on a horizontal surface is pulled by a horizontal applied force. It takes 5.5 N to start the block moving and 4.1 N to keep it moving at a constant velocity. T (a) Calculate the coefficients of friction. (b) Which changes below will affect the coefficients of friction? Explain. (i) turning the block onto another side (ii) changing the surface (iii) putting an object on top of the block (c) What effect will each situation have on the static and kinetic friction acting on each object? Explain. (i) putting an object on the block (ii) applying an upward force on the block (iii) putting slippery grease on the surface

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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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

3. A 1.4 kg block on a horizontal surface is pulled by a horizontal
applied force. It takes 5.5 N to start the block moving and
4.1 N to keep it moving at a constant velocity. T
(a) Calculate the coefficients of friction.
(b) Which changes below will affect the coefficients of
friction? Explain.
(i) turning the block onto another side
(ii) changing the surface
(iii) putting an object on top of the block
(c) What effect will each situation have on the static and
kinetic friction acting on each object? Explain.
(i) putting an object on the block
(ii) applying an upward force on the block
(iii) putting slippery grease on the surface

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