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science 10

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A tennis ball is held stationary and then dropped from the roof of a tall building. What will be its velocity after 3.0 s?

  • science 10 -

    V = -g*t, where
    g = 9.8 m/s^2 (on Earth)
    The minus sign is because the acceleration is in the negatve direction, assuming + is up.

    V(t=3s)= -29.4 m/s

    Air resistance has been neglected. That will slow it down.

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