Acart at the top of a hillis released and rolls down the hill. Which of the following describes the energy of the cart just as it reaches the bottom of the hill? The cart has maximum gravitational potential energy The cart has no energy. The cart has maximum kinetic energy The cart has equal gravitational potential and kinetic energy

## Step 1<br />The problem involves the concept of energy conservation in physics. The total mechanical energy of an object is the sum of its kinetic energy and potential energy. The total mechanical energy of an object remains constant if no external forces are acting on it.<br /><br />## Step 2<br />At the top of the hill, the cart has maximum gravitational potential energy because it is at the highest point in the gravitational field. However, its kinetic energy is zero because it is not moving.<br /><br />## Step 3<br />As the cart rolls down the hill, its potential energy decreases because it is getting closer to the ground. However, its kinetic energy increases because it is gaining speed.<br /><br />## Step 4<br />At the bottom of the hill, the cart has no gravitational potential energy because it is at the lowest point in the gravitational field. However, its kinetic energy is at its maximum because it is moving at its maximum speed.