In a closed system that has 45 J of mechanical energy, the gravitational potential energy of a ball rolling down an inclined plane decreases from 8 J to

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Which two particles are found in the center of an atom