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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 -

    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

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