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What changes in analysis will make it apply to situation

George of the jungle, with mass m, swings on a light vine hanging from a stationary tree branch. A second vine of equal length hangs from the same point, and a gorilla of larger mass M swings in the opposite direction on it. Both vines are horizontal when the primates start from rest at the same moment. George and the Gorilla meet at the lowest point of their swings. Each is afraid that one vine will break, so they grab each other and hang on. They swing upward together, reaching a point where the vines make an angle of 35.0 with the vertical. (a) Find the value of the ratio n/M. (b) What if? Try the following experiment at home. Tie a small magnet and a steel screw to opposite ends of a string. Hold the center of the string fixed to represent the tree branch, and reproduce a model of a motions of George and the Gorilla. What changes in your analysis will make it apply to this situation? What if? Next assume the magnet is strong so that it noticeably attracts the screw over a distance of a few centimeters. Then the screw will be moving faster immediately before it sticks to the magnet. Does this extra magnet strength make a difference?

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## Q : Angular acceleration of the wheels

A car has a top speed of 69 m/s (about 154 mi/h) and has wheels of radius 29 cm. If the car starts from rest and reaches its operating speed after 7.2 s, what is the angular acceleration of the wheels? Assume the car accelerates uniformly.