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SVETLANKA909090 [29]
3 years ago
15

A force of 42N is needed to start a box sliding across the floor. The weight of the box is 55N.

Physics
2 answers:
Bezzdna [24]3 years ago
4 0
I think the right answer is c
GenaCL600 [577]3 years ago
3 0

Explanation:

It is given that,

Force applied to the box, F = 42 N

Weight of the box, W = 55 N

(a) Let f is the force of the friction acting on the box. The force of friction always opposes the motion of an object. It always equal to the applied force as :

f = -F = -42 N

(b) The frictional force is kinetic in nature because when the force is applied to the box it starts to move.

(c)  Let \mu is the coefficient of friction. It is given by :

\mu=\dfrac{f}{N}

\mu=\dfrac{42}{55}

\mu=0.76

Hence, this is the required solution.

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