A 100 g bead is free to slide along an 80 cm long piece of string ABC.

A 100 g bead is free to slide along an 80 cm long pieceof string ABC. The ends of the string are attached to avertical pole at A and C, which are 40 cm apart. Whenthe pole is rotated about its axis, AB becomeshorizontal.a. Find the tension in the string.b. Find the speed of the bead at B.

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