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A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 58 cm and is wrapped around the top at a place where its radius is 2.4 cm. The thickness of the string is negligible. The top is initially at rest. Someone pulls the free end of the string, thereby unwinding it and giving the top an angular acceleration of +13 rad/s². What is the final angular velocity of the top when the string is completely unwound? Before string is pulled After string is pulled Number Units
A baseball pitcher throws a baseball horizontally at a linear speed of 49.1 m/s. Before being caught, the baseball travels a horizontal distance of 19.5 m and rotates through an angle of 51.7 rad. The baseball has a radius of 3.54 cm and is rotating about an axis as it travels, much like the earth does. What is the tangential speed of a point on the "equator" of the baseball? Number i Units ◊
An electric fan is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 81.6 rad/s in 1.96 s. The magnitude of the angular deceleration is 46.7 rad/s². Determine the initial angular speed of the fan. Number i 198 Units
After 11.6 s, a spinning roulette wheel has slowed down to an angular velocity of 1.47 rad/s. During this time, the wheel has an angular acceleration of -6.46 rad/s². Determine the angular displacement of the wheel. a Number i Units