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If a person lifts a weight of 100 N to a height of 2 m in 4 seconds, what is the

Practice Questions

Q1
If a person lifts a weight of 100 N to a height of 2 m in 4 seconds, what is the power exerted?
  1. 50 Watts
  2. 100 Watts
  3. 200 Watts
  4. 25 Watts

Questions & Step-by-Step Solutions

If a person lifts a weight of 100 N to a height of 2 m in 4 seconds, what is the power exerted?
  • Step 1: Identify the force being lifted, which is 100 N.
  • Step 2: Identify the height to which the weight is lifted, which is 2 m.
  • Step 3: Calculate the work done using the formula: Work = Force × Distance.
  • Step 4: Substitute the values into the formula: Work = 100 N × 2 m.
  • Step 5: Calculate the work done: Work = 200 J (Joules).
  • Step 6: Identify the time taken to lift the weight, which is 4 seconds.
  • Step 7: Calculate the power using the formula: Power = Work / Time.
  • Step 8: Substitute the values into the formula: Power = 200 J / 4 s.
  • Step 9: Calculate the power: Power = 50 W (Watts).
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