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
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upward = 9.8m/s
downward = - 9.8m/s
upward = 9.8m/s
downward = - 9.8m/s
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since it's not getting influenced by any external body and freely falling while going upward it will have a deceleration of -g =9.8m/s^2 and while coming down it will be g =9.8m/s^2
mariya99:
please elaborate ur answer
a freely falling body has no external force except the gravitational force so when its going the gravitational force act downards on the body and produces a negative acc of -9.8 where as while coming downwards the body moves in the direction of force producing a positive acc of 9.8
thanks a lot ☺☺
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