Question: Consider the rock and string in Figure P6.43. The string is fastened to a hinge that allows it to swing completely around in a vertical

Consider the rock and string in Figure P6.43. The string is fastened to a hinge that allows it to swing completely around in a vertical circle. If the rock starts at the lowest point on this circle and is given an initial speed v_i, what is the smallest value of v_ithat will allow the rock to travel completely around the circle without the string becoming slack at the top? Assume the length of the string is 1.5 m.

Figure P6.43

y Hinge Rock

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