A 1000 W electric motor runs for 2 hours. How much work does it do? (2023)
Practice Questions
1 question
Q1
A 1000 W electric motor runs for 2 hours. How much work does it do? (2023)
720,000 J
1,000,000 J
2,000,000 J
1,440,000 J
Work = Power × Time = 1000 W × (2 × 3600 s) = 7,200,000 J.
Questions & Step-by-step Solutions
1 item
Q
Q: A 1000 W electric motor runs for 2 hours. How much work does it do? (2023)
Solution: Work = Power × Time = 1000 W × (2 × 3600 s) = 7,200,000 J.
Steps: 5
Step 1: Understand that power is the rate at which work is done. In this case, the power of the motor is 1000 W (watts).
Step 2: Convert the time the motor runs from hours to seconds. Since 1 hour is equal to 3600 seconds, multiply 2 hours by 3600 seconds/hour: 2 × 3600 = 7200 seconds.
Step 3: Use the formula for work, which is Work = Power × Time.
Step 4: Substitute the values into the formula: Work = 1000 W × 7200 s.
Step 5: Calculate the work done: 1000 × 7200 = 7,200,000 J (joules).
