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An object is thrown downward with an initial speed of 5 m/s from a height of 78 m above the ground. At the same instant, a second object is propelled vertically from ground level with a speed of 50 m/s.

The acceleration of gravity is 9.8 m/s2. At what height above the ground will the two objects pass each other?
Answer in units of m.

  • physics -

    The height of each is
    set them equal, solve for t.
    Then put time t into either, to solve for final height.

  • Physics -

    The acceleration due to gravity on planet X is
    one fifth that on the surface of the earth.
    If it takes 3.9 s for an object to fall a certain
    distance from rest on earth, how long would
    it take to fall the same distance on planet X?

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