An example of acceleration is:
a bicyclist turning around a corner
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- The acceleration is given by the rate of change of the velocity. It the object is stopping, the velocity is decreasing, and thus, the acceleration is negative, and if the object is accelerating, the velocity is increasing, and thus, the acceleration is positive.
- For the first option, of a bicyclist turning around a corner, he decreases the velocity to take the corner, then after the corner, the velocity increases again, thus, it is an example of acceleration.
- For the other options, in all cases, the velocity is constant, and thus, the acceleration is zero, that is, there is no acceleration.
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