You are helping your friend move a new refrigerator into his kitchen. You apply

Question

You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 260 N in the negative x direction to try and move the 57-kg refrigerator. The coefficient of static friction is 0.70.

(a) How much static frictional force does the floor exert on the refrigerator? Give both magnitude and direction magnitude

___________N

(b) What maximum force do you need to apply before the refrigerator starts to move?
_____ N

___________N

(b) What maximum force do you need to apply before the refrigerator starts to move?
_____ N

Explanation / Answer

here,

mass of the refrigerator , m = 57 kg

force applied , F = 260 N

us = 0.7

(a)

the static frictional force , fs = us*m*g

fs = 391.02 N

so, the static friction force is equal to the applied force

the static frictional force is 260 N

(b)

the maximum force needed to apply before the refrigerator starts to move is 391.02 N

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