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AURORKA [14]
3 years ago
9

There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what

horizontal force must one push to start sliding the top five books off the bottom one? a. 1 N c. 3 N b. 5 N d. 7 N
Physics
2 answers:
Bezzdna [24]3 years ago
7 0

Answer:

5n

Explanation:

NikAS [45]3 years ago
3 0

Answer:

b. 5 N

Explanation:

Each book weighs 5 N.  Therefore, five books weigh 25 N.  The friction force is:

Ff = Fn μ

Ff = (25 N) (0.2)

Ff = 5 N

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A spring with a spring constant of 50 N/m is stretched 15cm. What is the force and energy associated with this stretching?
Olenka [21]
Data:
F (force) = ? (Newton)
k (<span>Constant spring force) = 50 N/m
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\boxed{\boxed{F = 7.5\:N}}\end{array}}\qquad\quad\checkmark

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