1. Which one of the following choices represents the largest kinetic energy?
1. A leaf falls from a tree.
2. An oil tanker sails through the Panama Canal.
3. Mars is moving in its orbit around the Sun.
4. A cheetah runs at its maximum speed to catch a fleeing zebra.
5. A cyclist is racing in the annual Tour de France bicycle race.
2. While you sleep, your body is using energy at a rate of 77W. How many food calories are used through an eight hour period? One food calorie (C) is equal to 4186 joules.
1. 66 C
2. 240 C
3. 530 C
4. 710 C
5. 1200 C