Polly is pushing a box across the floor with a force of 30 N. The force of gravity is -8 N. And the normal force is 8 N. Which value could describe the force of friction if Polly could not move the box

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating

In a system, when potential energy decreases, then entropy also decreases. true false

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.