Question

which of the following objects is accelerating? select one: a. a ball moving at a constant rate around a circular hoop b. none of the possible answer choices is correct. c. a book at rest on a table, which is being both pulled by gravity and pushed by the table top d. a car moving constantly at 60 miles per hour down a straight and level highway

Answer 1

Answer: Option A is correct.

Explanation: To have acceleration, you need to have a change in speed or direction, or both. The ball moving around the circular hoop is not changing speed, but it is changing direction. So, it is accelerating.