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Posted by on Sunday, June 2, 2013 at 10:35am.

A ball is released from a tower at a height of 100 meters toward the roof of another tower that is 25 meters high. The horizontal distance between the two towers is 20 meters. With what horizontal velocity should the ball be imparted so that it lands on the rooftop of the second building?

  • physics - , Sunday, June 2, 2013 at 11:56am

    Hint:
    Calculate the time it takes to reach the lower roof, say t (in seconds), by solving for t in:
    (100-25)=(1/2)gt²

    The minimum horizontal velocity will be 20/t m/s

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