I'm the following situations, which ball has the greatest kinetic energy

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

True or false graphs must include scales that increase by the same amount

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?