Unformatted text preview: t = 0 s, the normal acceleration at the tip of the blade is 2.4 m/s 2 . The blade is rotating with a constant angular acceleration, and when t = 5 s the blade rotates through an angle of 110 rad. Find the speed at the tip of the blade at t = 5 s. Ans : 25.2 m/s CHANG 4 At t = 0 s a point P on the rim of the a disk has an initial speed of 50 m/s, and its motion starts to slow down at a constant tangential deceleration of 10 m/s 2 . At what time will the normal acceleration equal g if the diameter of the disk is 0.4 m? Ans : 4.86 s 2.5 m 1 m O 36.87° F 1 = 100 N F 2 = 120 N Torque CHANG 5 Find the total torque about the pivot O by the two forces. Ans : 60 N·m CW...
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 Spring '08
 TSChang
 Physics, Acceleration, Force, Work, Rotation

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