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A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is?
Most Upvoted Answer
A book of weight 20N is pressed between two hands and each hand exerts...
Weight of book =friction between hand and book
mg=in
20=u (40+40)
20=u (80)
u=20/80
u=0.25
mg=in
20=u (40+40)
20=u (80)
u=20/80
u=0.25
Community Answer
A book of weight 20N is pressed between two hands and each hand exerts...
Given:
- Weight of the book = 20N
- Force exerted by each hand = 40N
To find:
- Coefficient of friction
Explanation:
When the book just starts to slide down, the force of friction acting on the book is equal to the maximum static friction.
The maximum static friction can be calculated using the formula:
Maximum static friction (F_s) = coefficient of friction (μ_s) * normal force (N)
The normal force (N) is equal to the weight of the book, which is 20N.
Therefore, the maximum static friction is given by:
F_s = μ_s * N
Given that each hand exerts a force of 40N, the total force applied on the book is 80N.
Since the book is not moving vertically, the vertical forces must be balanced. Therefore, the normal force (N) is equal to the weight of the book, which is 20N.
Calculating the Coefficient of Friction:
To find the coefficient of friction, we can rearrange the equation for maximum static friction:
F_s = μ_s * N
μ_s = F_s / N
Substituting the values, we have:
μ_s = 80N / 20N
μ_s = 4
Therefore, the coefficient of friction (μ_s) is 4.
Conclusion:
The coefficient of friction between the book and the hands is 4. This means that the frictional force between the book and the hands is four times the normal force.
- Weight of the book = 20N
- Force exerted by each hand = 40N
To find:
- Coefficient of friction
Explanation:
When the book just starts to slide down, the force of friction acting on the book is equal to the maximum static friction.
The maximum static friction can be calculated using the formula:
Maximum static friction (F_s) = coefficient of friction (μ_s) * normal force (N)
The normal force (N) is equal to the weight of the book, which is 20N.
Therefore, the maximum static friction is given by:
F_s = μ_s * N
Given that each hand exerts a force of 40N, the total force applied on the book is 80N.
Since the book is not moving vertically, the vertical forces must be balanced. Therefore, the normal force (N) is equal to the weight of the book, which is 20N.
Calculating the Coefficient of Friction:
To find the coefficient of friction, we can rearrange the equation for maximum static friction:
F_s = μ_s * N
μ_s = F_s / N
Substituting the values, we have:
μ_s = 80N / 20N
μ_s = 4
Therefore, the coefficient of friction (μ_s) is 4.
Conclusion:
The coefficient of friction between the book and the hands is 4. This means that the frictional force between the book and the hands is four times the normal force.
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A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is?
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A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is?.
A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A book of weight 20N is pressed between two hands and each hand exerts a force of 40N. If the book just starts to slide down. Coefficient of friction is?.
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