Question

question 8
which is not an example of acceleration?
○ skating in a straight line at constant speed
○ skating in a straight line while slowing down
○ skating in a circle at constant speed
○ skating in a straight line while speeding up
question 9
below is a position time graph showing a persons motion while running.

Explanation:

Acceleration is a change in velocity, which can be a change in speed or direction. Skating in a straight - line at constant speed has no change in speed or direction. Slowing down is negative acceleration, skating in a circle changes direction (even at constant speed), and speeding up is positive acceleration.

Answer:

skating in a straight line at constant speed