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If a person does 300 J of work in 15 seconds, what is their average power output

Practice Questions

Q1
If a person does 300 J of work in 15 seconds, what is their average power output?
  1. 20 W
  2. 15 W
  3. 25 W
  4. 30 W

Questions & Step-by-Step Solutions

If a person does 300 J of work in 15 seconds, what is their average power output?
  • Step 1: Understand the formula for power, which is Power = Work / Time.
  • Step 2: Identify the amount of work done, which is 300 Joules (J).
  • Step 3: Identify the time taken to do the work, which is 15 seconds (s).
  • Step 4: Plug the values into the formula: Power = 300 J / 15 s.
  • Step 5: Calculate the result: 300 divided by 15 equals 20.
  • Step 6: Conclude that the average power output is 20 Watts (W).
  • Power – Power is the rate at which work is done or energy is transferred, calculated as work divided by time.
  • Work – Work is defined as the product of force and displacement in the direction of the force, measured in joules (J).
  • Time – Time is the duration over which work is performed, measured in seconds (s).
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