Mary applies a force of 80 N to push a box with an acceleration of 0.40 m/s². When she increases the pushing force to 86 N, the box's acceleration changes to 0.63 m/s². There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? 200 x Consider applying Newton's Second Law to each the pushing forces. kg (b) What is the coefficient of kinetic friction between the floor and the box? -0.020 x What is the relation between friction force and normal force? Did you apply Newton's Second Law to motion in the vertical direction?

Principles of Physics: A Calculus-Based Text
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Author:Raymond A. Serway, John W. Jewett
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Chapter1: Introduction And Vectors
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Mary applies a force of 80 N to push a box with an acceleration of 0.40 m/s². When she increases the pushing force to 86 N, the box's acceleration changes to 0.63 m/s². There is a constant friction force present between the floor and the box.
(a) What is the mass of the box in kilograms?
200
X
Consider applying Newton's Second Law to each of the pushing forces. kg
(b) What is the coefficient of kinetic friction between the floor and the box?
-0.020
X
What is the relation between friction force and normal force? Did you apply Newton's Second Law to motion in the vertical direction?
Transcribed Image Text:Mary applies a force of 80 N to push a box with an acceleration of 0.40 m/s². When she increases the pushing force to 86 N, the box's acceleration changes to 0.63 m/s². There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? 200 X Consider applying Newton's Second Law to each of the pushing forces. kg (b) What is the coefficient of kinetic friction between the floor and the box? -0.020 X What is the relation between friction force and normal force? Did you apply Newton's Second Law to motion in the vertical direction?
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