- #1

katj

- 3

- 0

Stage 1: Work done on the skier by the chairlift.

Stage 2: Potential Energy of the skier at the mountaintop.

Stage 3: Kinetic energy of the skier at the bottom of the mountain.

Stage 4: Work done on the skier to come to a stop.

Us this scenario to describe the signs (positive or negative) of the energy in each of these stages of the scenario.

A. Positive, Positive, Positive, Positive

B. Positive, Positive, Positive, and Negative

C. Positive, Positive, Negative, Positive

D. Negative, Positive, Positive, Negative

E. Negative, Positive, Positive, Positive

I am thinking that the answer should E, but I am not sure. It takes energy to do work, so stages 1 and 4 would be negative (I guess?). Stages 2 and 3 describe energy that the skier HAS, so they would be positive. I think!