Physics Problem! Please help!!?

francisco-efrancisco-e
in Science & Mathematics

A ball is thrown straight up from the ground with speed v_0. At the same instant, a second ball is dropped from rest from a height {H}, directly above the point where the first ball was thrown upward. There is no air resistance.

Find the time at which the two balls collide.

Express your answer in terms of the variables H, v_0, and appropriate constants..

Comments

  • raiaraia

    H1(t)=v_0*t-4.9t^2

    H2(t)=H-4.9t^2

    H1=H2

    so...

    v_0*t-4.9t^2=H-4.9t^2

    v_0t=H

    t=H/v_0

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