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.
