A motor of power 900 W runs for 3.5 minutes. How much work does it do?
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A motor of power runs for minutes. How much work does it do?
Need a reminder? The key ideaShow
Power , in watts: . The energy used is , with in seconds.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Time. .
Step 2. Work. .
Answer: , or .
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