Question

must be clear and self-explanatory to receive full credit. All numerical answer must have correct number of significant figures with appropriate units. 9. (10 pts) A 0.400-kg object is swung in a circular path and in a vertical plane on a 0.500-m-length string. The angular speed at the bottom is 8.00 rad/s. (a) What is magnitude and direction of the net force on the object at the bottom? (6) What is the tension in the string when the object is at the bottom of the circle?

Answer 1

A)

Force, F = m L w^2 + mg

F = (0.4 x 0.5 x 8^2) + (0.4 x 9.8) = 16.7 N (upward)

B)

Tension, T = 16.7 N (downward)

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