Using a horizontal force F, a table is moved across the floor at a constant velocity. How much is the frictional force exerted by the floor on the table?
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- The table moves at a constant velocity, so its velocity is not changing.
- So the net force on the table is zero.
- The applied force and the force of friction must be equal and opposite.
- Answer: The frictional force is equal to F, acting opposite to the direction of motion.