define acceleration and give it's SI unit when acceleration of body negative? give two examples of situations in which acceleration of body is negative
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It is a vector quantity .. 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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-Acceleration is the rate of change of velocity. The SI unit is m/s2(metre per second square).
-When the acceleration is opposite to the velocity the the body is said to be in negative acceleration.
-Examples:1.A car breaking is a common, everyday example of negative acceleration
2.A ball thrown up in sky with high velocity
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