Explanation: Acceleration is the rate of change in velocity. Involves a change in speed and direction. When acceleration involves a change in speed only: Positive acceleration it occurs when an object speeds up. Negative acceleration it occurs when an object slows down. Acceleration is a change of velocity over a period of time, expressed by the equation below.
A=Δv/t
vf-vi=Δv/t
A=m/s-m/s/s
=m/s/s=m/s²
m/s/s
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