Question

multiple select question
select all that apply
choose all the situations for which the object is accelerating.
a boomerang traveling at constant speed around in a circle.
a car driving straight down the road with the cruise control on.
a toy plane flying straight and flat with constant speed.
a person rocking in a rocking chair.

Explanation:

Acceleration occurs when an object changes its speed, direction, or both.

1. A boomerang moving in a circle at constant speed changes direction continuously, so it accelerates.
2. A car on cruise control moving straight has constant speed and direction, so no acceleration.
3. A toy plane moving straight at constant speed has no change in speed/direction, so no acceleration.
4. A person rocking in a chair changes speed and direction as they switch movement directions, so they accelerate.

Answer:

A. A boomerang traveling at constant speed around in a circle.
D. A person rocking in a rocking chair.