Tas watches as his uncle changes a flat tire on a car. His uncle raises the car using a machine called a jack. Each time his uncle pushes down on the jack handle, the car rises up. Tas sketches the jack and labels it using the symbols F, to represent force, and d, to represent distance. He uses large and small letters to compare the sizes of the forces and distances.Which set of labels is correct for the side of the jack that Tas’s uncle pushes on?
A jack multiplies the force applied to its handle, allowing a smaller input force to lift the car. The handle moves a relatively large distance while the car rises a smaller distance. So the side Tas’s uncle pushes on has a small F and a large d: choice D.
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