Quiz Revisions: Bored during the Pandemic, you decided that this would be the perfect time to redesign your
kitchen AND practice physics. So you push your fridge. Your fridge has a mass of 150 kg and
the coefficient of kinetic friction between your fridge
and the ground is.35. You
push the fridge
with a force of 600 N. You push the fridge a distance of 5 m.
1. What is the frictional force the fridge experiences?
Student Response: The fridge experiences a frictional force of .35.
Why is this student incorrect? What should the answer be?

fr = 514.5 N,    This force has the opposite direction to the applied force.

Explanation:

Let's propose the solution of the problem using Newton's Second Law, we place a reference frame with the horizontal x-axis

Y axis

         N- W = 0

         N = W

X axis

         F -fr = m a

the friction force has the expression

        fr = μ N

        fr = μ mg

        fr = 0.35  150  9.8

        fr = 514.5 N

This force has the opposite direction to the applied force.

The student's answer is incorrect because the friction coefficient must be multiplied by the normal

the part of the wave he is travelling on is the crest

i think the answer is tomato juice? not entirely sure though