Acceleration
What is it?
Acceleration is the rate of change of velocity over time.
Automotive engineers pay attention to a car's acceleration - or its ability to speed up in a short amount of time. They rank cars by how fast they can accelerate (or change velocity) from zero to 60 miles per hour.
Give me an example!
Have you ever rolled a ball down an incline? As it starts rolling down the incline, the ball must first overcome the force called inertia. As it rolls, the ball's velocity increases as gravity takes over. The rate of change in speed is the ball's acceleration.
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