The motor A accelerates uniformly from zero to 4900 rev/min in 19 seconds after it is turned on at time t = 0. It drives

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The Motor A Accelerates Uniformly From Zero To 4900 Rev Min In 19 Seconds After It Is Turned On At Time T 0 It Drives 1 (128.68 KiB) Viewed 29 times

The motor A accelerates uniformly from zero to 4900 rev/min in 19 seconds after it is turned on at time t = 0. It drives a fan (not shown) which is attached to drum B. The effective pulley radii are shown in the figure. Determine (a) the number of revolutions turned by drum B during the 19-second startup period, (b) the angular velocity of drum B at time t = 10 s, and (c) the number of revolutions turned by drum B during the first 10 seconds of motion. Assume no belt slippage. Answers: B T₁=70 mm 7 = 195 mm (a) Att 19 s, Ng= (b) At t= 10 s, WB = (c) Att = 10 s, Ng= i A rev rad/s rev