1 / 37

Potential and Kinetic Energy Problems

Potential and Kinetic Energy Problems. What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high?. Potential and Kinetic Energy Problems.

katen
Download Presentation

Potential and Kinetic Energy Problems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Potential and Kinetic Energy Problems What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high?

  2. Potential and Kinetic Energy Problems What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high? PE = mgh

  3. Potential and Kinetic Energy Problems What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high? PE = mgh PE = 100N x 300m

  4. Potential and Kinetic Energy Problems What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high? PE = mgh PE = 100N x 300m PE = 30,000N*m

  5. Potential and Kinetic Energy Problems What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high? PE = mgh PE = 100N x 300m PE = 30,000N*m PE = 30,000J

  6. Potential and Kinetic Energy Problems 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s?

  7. Potential and Kinetic Energy Problems KE = ½ mv2 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s?

  8. Potential and Kinetic Energy Problems KE = ½ mv2 KE= ½ (14kg)(3m/s)2 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Square 1st

  9. Potential and Kinetic Energy Problems KE= ½ mv2 KE= ½ (14kg)(3m/s)2 KE = ½ (14kg) (9m2/s2) 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Multiply 2nd

  10. Potential and Kinetic Energy Problems KE= ½ mv2 KE= ½ (14kg)(3m/s)2 KE = ½ (14kg) (9m2/s2) KE = ½ 126 kg*m2/s2 = 126 N*m 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s?

  11. Potential and Kinetic Energy Problems KE= ½ mv2 KE= ½ (14kg)(3m/s)2 KE = ½ (14kg) (9m2/s2) KE = ½ 126 kg*m2/s2 = 126 N*m 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Kg*m/s2

  12. Potential and Kinetic Energy Problems KE= ½ mv2 KE= ½ (14kg)(3m/s)2 KE = ½ (14kg) (9m2/s2) KE = ½ 126 kg*m2/s2 = 126 N*m 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Divide last

  13. Potential and Kinetic Energy Problems KE= ½ mv2 KE= ½ (14kg)(3m/s)2 KE = ½ (14kg) (9m2/s2) KE = ½ 126 kg*m2/s2 = 126 N*m KE = 63 Joules 2. What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s?

  14. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball?

  15. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE = ½ mv2

  16. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE= ½ mv2 50J = ½ (1kg)v2

  17. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE= ½ mv2 50J = ½ (1kg)v2 2 x 50J = (1kg)v2x 2 2

  18. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE= ½ mv2 50J = ½ (1kg)v2 2 x 50J = (1kg)v2x 2 2 100kg*m2/s2 = (1kg)v2 1 kg 1kg

  19. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE= ½ mv2 50J = ½ (1kg)v2 2 x 50J = (1kg)v2x 2 2 100kg*m2/s2 = (1kg)v2 1 kg 1kg 100 m2/s2 = v2

  20. Potential and Kinetic Energy Problems 3. A 1-kilogram ball has a kinetic energy of 50 joules. What is the velocity of the ball? KE= ½ mv2 50J = ½ (1kg)v2 2 x 50J = (1kg)v2x 2 2 100kg*m2/s2 = (1kg)v2 1 kg 1kg 100 m2/s2 = v2 10m/s = v

  21. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock?

  22. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? Given in kg, not Newtons…must multiply mass times gravity

  23. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? PE = mgh

  24. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? PE = mgh PE = 95kg(9.8m/s2)(100m)

  25. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? PE = mgh PE = 95kg(9.8m/s2)(100m) PE = 93,100 kg*m2/s2 kg*m/s2 = N *m

  26. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? PE = mgh PE = 95kg(9.8m/s2)(100m) PE = 93,100 kg*m2/s2 kg*m/s2 = N *m PE = 93,100 N*m

  27. Potential and Kinetic Energy Problems 4. What is the potential energy of the rock? PE = mgh PE = 95kg(9.8m/s2)(100m) PE = 93,100 kg*m2/s2 kg*m/s2 = N *m PE = 93,100 N*m PE = 93,100 J

  28. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes?

  29. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh

  30. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg(9.8m/s2)(3.0m)

  31. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg(9.8m/s2)(3.0m) PE = 58.8 kg*m2/s2 or N*m

  32. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg(9.8m/s2)(3.0m) PE = 58.8 kg*m2/s2 or N*m PE = 58.8 J

  33. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh

  34. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg (9.8m/s2)(1.0m)

  35. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg (9.8m/s2)(1.0m) PE = 19.6 kg*m/s2 or N*m

  36. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? PE = mgh PE = 2.0kg (9.8m/s2)(1.0m) PE = 19.6 kg*m/s2 or N*m PE = 19.6 J

  37. Potential and Kinetic Energy Problems 5. What is the approximate difference in gravitational potential energy of the two shaded boxes? 58.8J – 19.6J = 39.2J

More Related