Define acceleration and give its S.I unit .When is acceleration of a body negative? Give two examples of situations in which acceleration of the body is negative
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the rate of change of velocity is called acceleration.. si unit of Acceleration metre/second ² a= v-u /t = velocity /time
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Acceleration is the rate of change of velocity of an object with respect to time. SI unit of acceleration is ms-². The acceleration of body negative when it is opposite to the direction of velocity.
Example: 1. applying break.
2. A car stopping in front of red light.
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