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Potential and Kinetic Energy Notes [Page 16]
Problems [Page 17]:
Calculating Potential Energy
1a. A skier with mass 50 kg sits on top of a 100m high hill. What is his potential energy?
1b. A skier with mass 50 kg skis down the hill and is now 50m high. What is his potential energy?
1c. A skier with mass 50 kg skis down the hill and is now 25 m high. What is his potential energy?
1c. A skier with mass 50 kg skis down the hill and is now at the bottom of the hill. What is his potential energy?
1d. Where did all his potential energy go?
Calculating Kinetic Energy
2a. What is the kinetic energy of a 2 kg bowling ball traveling at 1 m/s?
2b. What is the kinetic energy of a 2 kg bowling ball traveling at 2 m/s?
2c. What is the kinetic energy of a 2 kg bowling ball traveling at 3 m/s?
2d. What is the kinetic energy of a 2 kg bowling ball traveling at 4 m/s?
2e. How is kinetic energy related to velocity?
3a. If you drop a 1 kg rock off a building that is 300 m high, what is the rock’s potential energy at the top of the building?
3b. What is the rock’s kinetic energy at the top of the building?
3c. What is the rock in #1a’s Potential energy half way down the building?
3d. What is the rock in #1a’s potential energy when it reaches the bottom of the building?
3e. Where did all the energy go?
4a. A 100 kg roller coaster is pulled up to the top of its first hill from 0 meters to 50 meters. What is the change in potential energy of the coaster?
4b. At the top of the first hill, the coaster comes to a stop. What is the kinetic energy of the coaster?
4c. At the bottom of the first hill, the coaster is going 31.6 m/s. What is the kinetic energy of the coaster?
4d. What is the potential energy of the coaster at the bottom of the first hill?
4e. Where did all the potential energy in 4a go when the coaster reached the bottom of the hill?