Define acceleration and give its SI 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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Solution

Dear Student
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.
REGARDS

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