Question

give one example each of the type of motion when :
(i) acceleration is positive
(ii) acceleration is negative
(iii) acceleration is zero

Answer 1

1. When an object is moving in a circular path.
2. When an object is moving and suddenly brakes are applied.
3. When an object is moving with constant velocity.

Answer 2

heya ..
here is Ur answer ...
1) when a body falls to earth from height it's acceleration is +g
2) when the the body is projected upwards then acceleration is - g
3) it is zero when a body travels with uniform velocity
hope this helps u dear