- 1. A bulldozer does work of 36000 joules over a distance of 400 meters. How much force does the bulldozer have?
- 2. A people-moving conveyor-belt moves a person with a force of 900 newtons a distance of 100 meters through the airport. How much work was done?
- 3. A woman carries her child who has downward force of 100 newtons a distance of 30 meters. How much work does the woman do?
- 4. Bill runs into a building with a force of 125.2 newtons. He traveled a distance of 28 meters in a time of 5.2 seconds. What is his mass? (Hint: this is a two step problem).
- 5. Bill sprints a distance of 50 meters in 10 seconds. What is his velocity?
- 6. Tim completes 142.7 joules of work over a distance of 45.4 meters. What was his force?
- 7. Bob is a boxer and hits his opponent with a knockout puch. His hand has a mass of 9.7 newtons. He accelerates his hand at 5.4 meters per second. With how much force did he hit his opponent?
- 8. Two hockey players are skating at each other. Player A has a mass of 978 kg and skates a distance of 13 meters in a time of 1.38 seconds. Player B has a mass of 945 kg and skates a distance of 20 meters in a time of 1.51 seconds. Who has more force?
- 9. A high jumper with a downward force of 650 newtons does 1175 joules of work. How high did he jump off the ground? (Hint: Think about what height is. Is it a measure of weight, force, distance, or work).
- 10. What is the Kinetic Energy of a car with a mass of 2560 kg moving 28 m/s.
A) 1003520 Joules
B) 784 Joules
C) 2007040 Joules
D) 71680 Joules
E) 91.4 Joules
- 11. Bill travels 20 meters in 4 seconds. He has a mass of 230 kg. What was his kinetic energy?
- 12. Explain what is going on in this graph with potential and kinetic energy. The Red is potential energy and the Blue is kinetic energy. Use numbers to help your explanation.
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