# Angular speed ω of 14000 revmin the test engineers

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Sample 9 continued How much energy was released in the explosion of the rotor?
TORQUE, NEWTON’S SECOND LAW FOR ROTATION, & WORK
Torque
.
O
Torque)sin)((FrTwo equivalent ways of computing torque:trFFr)sin)((FrFr))(sin(
Torque
Checkpoint 6The figure shows an overhead view of a meter stick that can pivot about the dot at the position marked 20 (for 20 cm). All five forces on the stick are horizontal and have the same magnitude. Rank the forces according to the magnitude of the torque they produce, greatest first.
Newton’s 2ndLaw For RotationTorque and angular acceleration can be related through Newton’s 2ndLaw just like force and linear acceleration. netI
Sample 10The figure below shows a uniform disk, with mass M= 2.5 kg and radius R = 20 cm, mounted on a fixed horizontal axle. A block with mass m= 1.2 kg hangs form a massless cord that is wrapped around the rim of the disk. Find the acceleration of the falling block, the angular acceleration of the disk, and the tension in the cord. The cord does not slip, and there is no friction at the axle.
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