Posted by raj on .
projectile motion with constant horizontal speed ? A stone falls off a cliff with horizontal velocity v m/s. it falls a distance of 5cm vertically and 200m horizontally in t seconds. when it has fallen a vertical distance of 20cm, what is its horizontal distance from the cliff? (its horizontal speed is constant) how to solve this problem using proportion?

physics 
bobpursley,
isnt horizontal distance proportional to time (yes).
isn't vetical distance proportional to time squared?
t1/t2=H1/H2= sqrt(V1/V2)
so V1=5cm, V2=20 cm so sqrt (V1/V2)=1/2
so horizontal distance H2=2*200m