3. Energy and Work
Power — Quiz
Test your understanding of power with 5 practice questions.
Practice Questions
Question 1
A crane lifts a 200 kg load to a height of 10 m in 5 seconds. What is the power output of the crane? (Assume $g = 9.8 \, \text{m/s}^2$)
Question 2
A 100 W electric fan runs for 2 minutes. How much energy does it consume?
Question 3
A motor outputs 500 W of power. How much work does it do in 10 seconds?
Question 4
If a machine’s power output is 250 W and it runs for 40 seconds, how much energy does it transfer?
Question 5
Which of the following is the correct relationship between power, work, and time?