What is the total amount of heat in a substance

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

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.