Question

The given diagram shows a hill with four labelled positions W, X, Y and Z. When a ball is rolled down the hill, then from which position will it finish rolling with the greatest speed?

• A. Position W
• B. Position X
• C. Position Y
• D. Position Z

Answer 1

Answer: (A)

Position W

At position Z the ball has potential energy (energy that an object has due to its position). When it starts rolling down, the potential energy changes into kinetic energy (energy that an object has due to its movement) and at point W, it will have maximum kinetic energy as compared to points Y and X and thus from this position, it will finish rolling with the greatest speed.