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11 years ago
Here is my actual problem that i am trying to figure out: A horizontal force of 80 N is required to push a box across a floor at constant velocity. What is the net force acting on the box? How large is the frictional force that acts on the box?
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11 years ago
If it's at constant velocity then the horizontal force must be balanced by the frictional force.

It's also not moving up/down so gravity and the normal force must be equal as well. The force of friction is equal to the normal force times the coefficient of friction for the surface.
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TontinTontin
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11 years ago
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#3
11 years ago
Since box is at constant velocity, thus net force on the box = 0; ie acceleration is zero, net force = mass * acc = 0 ---answer

the frictional force that acts on the box = 80N ---answer
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