Question

8.
Define acceleration and state its si
Unit. For motion along a straight line
when do we consider the acceleration
to be (1)Positive (2) negative. Give an
example of a body in uniform acceleration ​

Answer 1

Hey guys your answer is here...

The SI unit of acceleration is meter per second square. The acceleration is said to be positive when acceleration is in the same direction and when it is in the opposite direction we say that acceleration is negative. The motion a freely falling body is an example of body moving with uniform acceleration.

example 2 car moving with constant speed

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Answer 2

Answer:

acceleration is defined as the rate of change of velocity with time . it's si unit is m/s^2 .

acceleration is considered as negative when the body accelerates in opposite direction .

and positive when the body accelerates in same direction .

hope May it helps