define acceleration and give its SI unit when is acceleration of a body negative give one example of situation in which aacceleration of the body is
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Acceleration is rate of change of velocity and its SI unit is m per sec square. Body has negative acceleration when the velocity is decreasing. When the car stops acceleration is negative as brakes are applied. ball moving initially is and force is applied in opposite direction.
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Its SI unit is meter/second^2. When the velocity of an object decreases,then the object is said to be moving with negative acceleration.. An example of negative acceleration would be a car breaking or decelerating.
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