4.38. Power http://www.ck12.org
Explore More
At the following URL, review what power means and how it is calculated. Then do the first four Check Your
Understanding problems. Be sure to check your answers and read the explanations. For an extra challenge, try to do
the last two Check Your Understanding problems.
http://www.physicsclassroom.com/Class/energy/u5l1e.cfm
Review
- What is power? What is the SI unit for power?
- How much power does a toaster have if it does 21,000 joules of work in 30 seconds?
- How much work can be done in 30 seconds by a 1000-watt microwave oven?
- Lamar’s mom has a car with a 182-horsepower engine. How many watts of power is that?