What is the primary force that causes the seafloor to spread and continents to drift?

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.

Drag each tile to the correct box. tiles bra i sequence

The applied force of 3 washers will increase the applied force on the car to n.