What do you understand by the term acceleration? What is meant by its being positive or negative?
Explain with example. Write its Sl unit.
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Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
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Acceleration is the change of velocity in a unit time. It is denoted by 'a'. ... The SI unit of acceleration is m/s^2. Some examples when the acceleration can be negative- When we are moving in a car and we slow up the car the acceleration will come down and will be in negative.
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