When a car is stop, it has no moving energy. When a car is moving, it has energy. The faster a car is moving, the more energy the car is having. We use more gas to move a car faster.
A faster car gives away more energy to the ground and the air.
When a car is moving, it slows down without stepping on gas and break. The energy goes to heat and moving the air around the car and the ground underneath the car.
If we step on break harder, more moving energy of the car is turned to heat on the break and on the ground. This mean the energy used to move the car faster is wasted on heat than on moving the car.
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