PHYSICS

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A boy tosses a coin upward with a velocity of 20m/s

What will be the maximum height?
Time of flight?
Velocity as it returns to the hand?
Velocity as it hits the ground?

  • PHYSICS -

    v = Vi + a t
    so at top
    0 = 20 - 9.81 t
    solve for t at top
    T = time in air = 2 t

    h = h of hand + 20 t - 4.9t^2
    solve for h

    v at hand = -20 by symmetry

    I do not know how high his hand was so can say nothing about ground

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