(18 pts) Two balls are tied together via string and then swung in a vertical circular path using a second string, as shown in the figure. During this motion, the two strings are co-linear at all times. The first ball has mass mị 0.4 kg, and the second has m2 = 0.2 kg. Each of the two strings has an individual length l = 36 cm. At the top of its swing, m2 is traveling at v= 3.0 m/s. (a) What is the tension in String 1 at this instant? (b) What is the tension in String 2 at this instant? (c) Which string will break first if the combination is rotated faster and faster? (i.e. which tension will grow too large?) m1 String 1 e String 2

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A:

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A:

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A:

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.