When a body changes its velocity, it's labeled as acceleration. Acceleration measures the rate of which the velocity changes.
- a=acceleration (m/s^2)
- v=final velocity (m/s)
- u=initial velocity (m/s)
- t=total elapsed time of change (s)
A rate represents the change in something over a period of time. Acceleration is the change in velocity over a period of time. The difference in the initial velocity and the final velocity represents the change in velocity. The change in velocity over the time equals acceleration.
A car starts from rest and ends at a velocity of 20 m/s, spanning over a period of 4 seconds. What is the car's acceleration?
If the car is at rest, the initial velocity is 0.