Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart at a speed of 2 meters per second each way. Which is the best prediction? (1 point)
• The cart had the same kinetic energy going each way.
When it was full, the cart had less kinetic energy.
• When it was empty, the cart had less kinetic energy.
• The cart's kinetic energy depends on Mr. Starr's mass