The work done by the man on the lawnmower can be found by multiplying the magnitude of the displacement of the lawnmower by the magnitude of the component of the external force which is ALONG the displacement. In the image at the right, the force exerted by the man on the lawnmower is indicated with the solid yellow arrow, and the component of the force along the lawnmower's displacement is indicated by the horizontal, dashed, yellow arrow. The displacement of the lawnmower is indicated with the red arrow.
Rearrange the sentence in the self-quiz below to find the formula for the work done on the lawnmower by the man.
Work Done by the Man on the Lawnmower Self-Quiz
If you have not already, scroll to the top of the page and read the material before attempting this exercise. When you are ready to begin with this exercise, click on the parts to put them in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.