Question

A body is projected vertically upward direction from the surface of earth if upward direction is taken as positive then acceleration of body during its upward and downward journey are respectively

Answer 1

If the body get moving in the upward and downward , then gravitational forces else G is consider to be acting on the body is only on e direction.

Hence downward so the acceleration is (-)negative.

Therefore for the student can get an real ideas on solving this answer in fine manner.

Answer 2

when the body is moving up and down the gravitational force is acting on the body in one direction only that is downward .so acceleration is negative