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If you push a crate with a force of 80N and it slides at constant velocity,...

If you push a crate with a force of 80N and it slides at constant velocity, how great is the friction acting on the crate?

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Answer #1

When we apply a force on cart then it's motion will be opposed by the friction force. Here when we apply 80N then the cart will move with constant velocity. That means if force is less then 80N then the cart will not move. Because static friction will be greater then applied force. But when force is 80N then it will exceed the value of kinetic friction, (which is the maximum value of static friction) and thus give rise to the motion to the crate.

So the friction acting on the crate is 80N.

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