A 0.17-kg ball on a stick is whirled on a vertical circle at a constant speed. When the ball is at the three o’clock position, the stick's tension is 17 N. Find the tension in the stick when the ball is (a) at the twelve o’clock and (b) at the six o’clock positions

A stuntman whose mass is 69 kg swings from the end of a 3.1-m-long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the magnitudes of the tensions in the rope that are required to make him follow his circular path at each of the following points. army medio docume (a) at the beginning of his motion kN (b) at a height of 1.5 m above the bottom of the circular arc Fobiology kN (c) at the bottom of the arc kN hapter 3 Need Help? Watch It Read It

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A vehicle with a mass of 2.5x103 kg is driving at a speed of 66 km/h around a level roadway with a curvature radius of  56 meters, just staying on the roadway (i.e., driving at the maximum safe speed for this turn and the tire treads). What is the coefficient of friction between the tires and the road? (Hint: Watch your units above.) Answer: μ = __________ (no units)