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Understanding Power: Definition, Calculation, and Real-Life Example

Power is the rate at which work is done, indicating how quickly energy is transferred. For instance, a car's engine with greater power can accelerate the vehicle faster. Power can be calculated using the formula Power = Work or Power = Force x Distance / Time. In this context, work is measured in Watts (W), time in seconds (s), force in Newtons (N), and distance in meters (m). For example, if a tow truck exerts a force of 11,000 N to pull a car 5 m in 25 seconds, the power generated is 2,200 W.

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Understanding Power: Definition, Calculation, and Real-Life Example

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Presentation Transcript

  1. What is power?

  2. Rate at which work is done • Example: the greater a car’s engine power, the faster the engine can accelerate the car

  3. How do we calculate power?

  4. Power = work OR….. Power = force x distance time time Power = Watts (W) Time = seconds (s) Force = Newtons (N) Distance = meters (m)

  5. A tow truck exerts a force of 11000N to pull a car. It moves the car 5m in 25 seconds. What is the power of the tow truck? Power = force x distance time Power = (11000N)(5m) 25 sec Power = 2200W

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