Question

To move a heavy couch across a carpeted living room, what could be used todecrease the frictional force.Check all that apply.UM A. Attach wheels to the bottom of the couch so it rolls.U B. Push harder on the couch,C. Lay smooth cardboard along the carpet to reduce the coefficientof frictionD. Have a friend sit on the couch.

Answer 1

On rolling the wheel below the heavy couch, there is a rolling friction that is still present.

By pushing harder, the force of friction on the opposite direction of the motion will also be increased.

By increasing the weight of the couch with a friend on the couch, the value of the friction increases as,

`F=\mu mg`

As by laying the smooth cardboard, th coefficient of friction is reduced

The force of friction between the couch and the cardboard is zero.

Thus, the force of friction will be decreased.

Hence, the C option is the correct answer.