Question

*Which of the following is an example of acceleration?
A.After a traffic light turns green, a car speeds up
B: A football player slows to a stop after scoring a touchdown
C: A car driving 30 mi/h turns left at an intersection
D: All of the above
acceleration is a vector, it has magnitude and direction (with compass). It is the rate of change of the velocity vector.
If you speed up, that is acceleration
If you slow down, that is acceleration (even though negative)
If you change direction, that is acceleration
NOTE: all of those require force. Remember that. (Your tires do)

Related Questions

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traf... a car is stopped at a traffic light, which then turns green. The car speeds up for 85 seconds and tr... At the instant a traffic light turns green, a car starts from rest with a given constant acceleratio...