A remote controlled toy car accelerates from rest with constant acceleration,
a, under the power of its own wheels on a horizontal balcony until it shoots off
the edge of the balcony a distance d = 2 m from its starting point as shown in
the figure. If the balcony is h = 10 m high, and the horizontal distance from
the point it left the balcony to where the car lands on level ground is D = 4 m,
what was the initial acceleration, a, of the car (in m/s2)?

Question

A remote controlled toy car accelerates from rest with constant acceleration,
 a, under the power of its own wheels on a horizontal balcony until it shoots off
 the edge of the balcony a distance d = 2 m from its starting point as shown in
 the figure. If the balcony is h = 10 m high, and the horizontal distance from
 the point it left the balcony to where the car lands on level ground is D = 4 m,
 what was the initial acceleration, a, of the car (in m/s2)?