How much do you do if you push a garbage can with a force of 30N while sliding it 4 meters down the hall?
Someone left out the word WORK in your question. The question should read:
"How much Work do you do if you push a garbage can with a force of 30N while sliding it 4 meters"
The answer is
Work = Force x Distance,
which is
120 Joules in this case.