Question

if a block is already put in motion, which of the following statements apply? the force needed to overcome the sliding friction is less than the force needed to overcome the starting friction. the force needed to overcome the sliding friction is equal to the force needed to overcome starting friction. the force needed to overcome the sliding friction is greater than the force needed to overcome the starting friction. no force is needed to overcome sliding friction once force has been applied to overcome the starting friction.

Answer 1

Friction is a category that determines the resistance of the material, the substrate, the surrounding fluid, through which the movement is carried out. In order to start the block, a force is required to overcome the initial friction when the block should be started from the sleep state. During movement, friction exists, but the force required to overcome it, is less than the force required to overcome friction at the initial start of the block, because in addition to this force there is also an inertia force that seeks to keep the block in motion and helps in moving and overcoming friction.

The first option is correct.

Answer 2

The force needed to overcome the sliding friction is less than the force needed to overcome the starting friction.