Question

define accelartion and state its SI unit. for motion along a straight line, when is accelaration of a body negative ? Give two examples of situations in which acceleration of the body is negative.​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Acceleration is defined as the rate of change in velocity.

Its S.I. unit is m/s^2

For motion along a straight line, if the velocity of the body is increasing with time, then it is said to be in positive acceleration. While, if the velocity of the body is decreasing with time, then it is said to be in negative acceleration or retardation.

The motion of a freely falling body and a vertically thrown up body are the  example of uniform accelaration.