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March 30, 2017

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A ball is tied to one end of a string. The other end of the string is held fixed. The ball is set moving around a vertical circle without friction, and with speed vi = (Rg)1/2. At what angle from the bottom should the string be cut so that the ball will then travel through the center of the circle on its way to the ground?

  • Physics - ,

    I am wondering: what was the initial position of the ball.

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    After pushing a 22.2 kg kid and tricycle over 10.3 m of smooth, level sidewalk from rest, the "combo" is moving at 3.0 m/s. Find the combo's kinetic energy

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