Question

a body is thrown upwards ,when it is at the highest point, what is its acceleration

Answer 1

The acceleration will be opposed to gravity because the body is going upward

Answer 2

if the particle is thrown vertically upwards then at highest point velocity is zero so the acceleration acting on a body at highest point will be equal to g. = acc. due to gravity.

this is becuz when body is going up its net acc. at an instant is = g-a but at highest point equal to zero then net acceleration equal to g