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Momentum, Energy, Power, & Work Whiteboard Review

Test your understanding of concepts such as momentum, energy, power, and work through interactive questions and scenarios. Practice matching units, solving problems, and exploring the laws of physics in this comprehensive review session.

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Momentum, Energy, Power, & Work Whiteboard Review

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  1. Momentum, Energy, Power, & Work Whiteboard Review

  2. Impulse: (p) Momentum v m Momentum: kg-m/s kg m/s Law of conservation of momentum Potential Energy

  3. Kinetic Energy Law of conservation of energy Unit: Joule (J) Work Power Unit: Joule (J) Unit: Watt (W)

  4. Match those Units! • Momentum a. Joule • Force b. N·m • Energy c. kg·m/s • Work d. Watt • Power e. Newton

  5. Answers to “Match those Units!” 1. Momentum----------c. kg·m/s 2. Force-----------------e. Newton 3. Energy---------------a. Joule 4. Work------------------b. N·m or a. Joule 5. Power----------------d. Watt or J/s

  6. Two identical twins ascend a flight of stairs. Student A walks, student B runs. Who does more WORK getting to the top of the stairs?

  7. Question #1 • An object that has kinetic energy must be…. • At rest • In Motion • Falling • At an elevated position

  8. Question #2 • If you use 200 J of work in 25 s, how much power have you exerted?

  9. Question #3 • A woman lifts a 1500 N box 3 meters off the ground • How much work was done?

  10. Question #4 • If you push for an hour against a stationary wall, no work is done • On the wall • On you • Both of these • None of these

  11. Question #5 • Both children have the same mass. • Which child has more potential energy?

  12. Question #6 • Two objects, A and B, have the same size and shape, but A is twice as heavy as B. When they are dropped simultaneously from a tower, at the moment just before they reach the ground • A has more Momentum than B • B has more Momentum than A • B has more PE than A • Not enough information

  13. Question #7 • How much work is done on a 15 kg dog to move it 5 m? Include units.

  14. Question #8 • A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work, but different amounts of…….. • Work • Power • mass • Potential Energy

  15. Question #9 • A 50-caliber bullet has a weight of 0.045 kg and a KE of 5600 J. • What is the velocity of the bullet?

  16. Questions #10 • A 181 kg motorcycle is traveling at 76 m/s. How much kinetic energy does it have?

  17. Question #12 • A student climbs up 4 meters of stairs and does 150 J of work. • How much force was required? Include units.

  18. Question #13 • If you push for one hour on a stationary wall with 50 N of force, how much WORK do you do?

  19. Question #14 • An 80 kg person running at 6 m/s has how much momentum? Include units.

  20. Question #15 • If you push an object twice as far while applying the same force, do you do • Four times as much work (4x) • The same amount of work • Twice as much work (2x) • Half as much work (½x)

  21. Question #16 • If an object has kinetic energy, then it also must have • Momentum • Acceleration • Force • Impulse • None of these

  22. Question #17 • How much gravitational potential energy does a 120 kg person have on top of a 25 m building?

  23. Question #18 A 5000 N piano is lifted 1 m in 5 seconds. How much power did it take?

  24. Question #19 An sack is raised 3 m above the floor. It has a mass of 2 kg. What is its PE? 3m

  25. Question #20 A car moves 4 times fasterthan an identical slower car. The fast car has _______ the KE. a. Half b. twice c. 4 times c. 16 times

  26. Question #21 • Fill in the missing energy! PE 30 J KE = ? KE =?

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