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Power

Power. Motion, Forces & Energy Chapter 5.4 Pages 158-162. No-Notes Knowledge. What are the Units and the abbreviation for the following? Distance Time Force Work Power . … meter (m) _ second (s) … Newtons (N) _ joules (J) … Watts (W). No-Notes Knowledge.

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Power

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  1. Power Motion, Forces & Energy Chapter 5.4 Pages 158-162

  2. No-Notes Knowledge • What are the Units and the abbreviation for the following? • Distance • Time • Force • Work • Power • … meter (m) • _ second (s) • …Newtons (N) • _ joules (J) • …Watts (W)

  3. No-Notes Knowledge • What is the formula for Power? Power = Work Time • What is the formula for Work? Work = Force x Distance • How can you rewrite the formula for Power? Power = Force x Distance Time

  4. You carry a box of LEGOs upstairs to your room using 30J. It takes you 15 seconds. How much Power did you generate? Power = Work Time Power = 30J 15s Power = 2 Watts

  5. . • What is the power of a forklift if it picks up a 300,000 Joules car over 1 minute? Power = Work Time Power = 300,000J 60s Power = 5,000 Watts

  6. . • . • This weekend you spent 50 minutes (3,000 seconds) doing yard work. During that time, you estimate that you used 900N pushing a wheelbarrow 100m. What was your Power? Power = Work = Force x Distance Time Time Power = 900N x 100m 3,000s Power = 90,000N.m 3,000s Power = 30W

  7. What to Work On • Section 5.4 Review Questions • Answer numbers 1-5

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