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If a car engine has a power output of 150 kW, how much work can it do in 2 minut

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Question: If a car engine has a power output of 150 kW, how much work can it do in 2 minutes?

Options:

  1. 18000 J
  2. 9000 J
  3. 30000 J
  4. 180000 J

Correct Answer: 180000 J

Solution: 

Power is the rate of doing work. Work done can be calculated as W = P * t. Here, P = 150 kW = 150000 W and t = 2 minutes = 120 seconds. Thus, W = 150000 W * 120 s = 18000000 J.

If a car engine has a power output of 150 kW, how much work can it do in 2 minut

Practice Questions

Q1
If a car engine has a power output of 150 kW, how much work can it do in 2 minutes?
  1. 18000 J
  2. 9000 J
  3. 30000 J
  4. 180000 J

Questions & Step-by-Step Solutions

If a car engine has a power output of 150 kW, how much work can it do in 2 minutes?
Correct Answer: 18000000 J
  • Step 1: Understand that power (P) is the rate at which work (W) is done.
  • Step 2: Use the formula for work done: W = P * t.
  • Step 3: Convert the power from kilowatts to watts: 150 kW = 150000 W.
  • Step 4: Convert the time from minutes to seconds: 2 minutes = 120 seconds.
  • Step 5: Substitute the values into the formula: W = 150000 W * 120 s.
  • Step 6: Calculate the work done: W = 18000000 J.
  • Power and Work – Power is defined as the rate at which work is done, and work can be calculated using the formula W = P * t.
  • Unit Conversion – Understanding the conversion of power from kilowatts to watts and time from minutes to seconds is crucial for accurate calculations.
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