Motion in a straight line

Don't know the answer.

@KuldeepJaidev
assuming 0 initial velocity
velocity at time t will be
v^2= 2gx
y^2=kx
hence a opt
Don't know the answer.
@KuldeepJaidev
assuming 0 initial velocity
velocity at time t will be
v^2= 2gx
y^2=kx
hence a opt