Physics question help!! 10 pts!?

A projectile is thrown vertically upwards with a velocity v from the top of a cliff that is at a height of 50.0m above a road. At the same instant, a stationery truck that is at a distance of 10.0m from the base of the cliff, starts moving towards it with a constant acceleration of 1.00m/s2. Determine the velocity v so that the projectile hits the truck.