A grinding wheel 0.21 m in diameter rotates at 2500 rpm . Part A Calculate its angular velocity in rad/s. Express your answer using three significant figures. rad/s Submit Request Answer Part B What is the linear speed of a point on the edge of the grinding wheel? Express your answer to two significant figures and includ the appropriate units HA Value Units Submit Request Answer Part C

A 120 g ball and a 220 g ball are connected by a 30-cm-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm What is the speed of the 120 g ball? Express your answer with the appropriate units. v= μÀ Value Submit Units ? Units input for part A Previous Answers Request Answer

A 1.15-kg grinding wheel 22.0 cm in diameter is spinning counterclockwise at a rate of 20.0 revolutions per second. When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest Part A What was the angular acceleration (in rad/s) of the grinding wheel as it came to rest if we take a counterclockwise rotation as positive? Express your answer in radians per second squared. V ΑΣΦ Submit Request Answer Part B ? rad/s2 How many revolutions did the wheel make during the time it was coming to rest? Express your answer as a number of revolutions. ΜΕ ΑΣΦ Submit Request Answer Provide Feedback ? revolutions Next>>

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