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plutookooo
Hi!

My best answer would be that Jack’s applied force eventually became greater than the force of friction acting on the fridge. :)
lucainkviedma

Answer:

The correct answer is that Jack overcame the force of static friction.

Explanation:

Bodies that remain static, in contact with another surface, have a resistance to the movement called static friction force. This force must be overcome for the body to move. By pushing the refrigerator harder, Jack managed to overcome this frictional force and finally get it moving.

Have a nice day!

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