The upper end of the string of a simple pendulum is fixed to a vertical z-axis, and set in motion such that the bob moves along a horizontal circular path of radius 2 m, parallel to the xy plane, 5 m above the origin. The bob has a speed of 3 m/s. The string breaks when the bob is vertically above the x-axis, and it lands on the xy plane at a point (x, y).
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(a, c)
When the string breaks, the particle starts from the point (2, 0, 5) with speed u = 3 m/s, and moves as a projectile. It will reach the xy plane in 1 second.
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