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If a machine does 2000 J of work in 5 seconds, what is its power? (2022)

Practice Questions

Q1
If a machine does 2000 J of work in 5 seconds, what is its power? (2022)
  1. 400 W
  2. 200 W
  3. 100 W
  4. 500 W

Questions & Step-by-Step Solutions

If a machine does 2000 J of work in 5 seconds, what is its power? (2022)
  • Step 1: Identify the work done by the machine, which is 2000 Joules (J).
  • Step 2: Identify the time taken to do the work, which is 5 seconds (s).
  • Step 3: Use the formula for power, which is Power (P) = Work Done / Time.
  • Step 4: Substitute the values into the formula: P = 2000 J / 5 s.
  • Step 5: Calculate the power: 2000 J divided by 5 s equals 400 Watts (W).
  • Power – Power is the rate at which work is done, calculated as work done divided by the time taken.
  • Work-Energy Principle – Understanding the relationship between work and energy is crucial for solving power-related problems.
  • Units of Measurement – Recognizing that power is measured in watts (W), where 1 W = 1 J/s.
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