My answer was positive but my teacher insisted that as it is directed away from the surface of earth, it will be negative.
Please any authentic reference for this?
I need this for my upcoming entrance test.
Please any authentic reference for this?
I need this for my upcoming entrance test.
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It is arbitrary. You can define the +ve direction to be whatever you want as long as you remain consistent within your working.
But just to point out something, g is the same direction above or below ground anyway, the thing that changes sign is the distance form your reference point, assuming the reference is ground level.
But just to point out something, g is the same direction above or below ground anyway, the thing that changes sign is the distance form your reference point, assuming the reference is ground level.
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Its positive, you are accelerating towards the earths centre of gravity
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It's all up to you.all depends on Reference frame.generally +ve is taken when a body is going downward