A wheel accelerates from rest at 25 rad/s? for 6 seconds. Direction of rotation a. What is the angular velocity after 3 seconds? After 6 seconds? b. What is the angular displacement after the 6 seconds? c. How many times does the wheel rotate during those 6 seconds?

A record player rotates a record at 45 revolutions per minute. When the record player is switched off, it makes 4.0 complete turns at a constant angular acceleration before coming to rest. What was the magnitude of the angular acceleration (in rads/s2) of the record as it slowed down? A. 0.44 rad/s2 B. 0.88 rad/s2 C. 1.5 rad/s2 D. 2.8 rad/s2 D B O A O C

A 6 cm diameter, 550 g solid sphere is released from rest at the top of a 2.0 m long, 35° incline. It rolls, without slipping, to the bottom. a. What is the sphere’s angular velocity at the bottom of the incline?b. What fraction of its kinetic energy is rotational?

7. A flywheel (I = 50 kgm2 ) starting from rest acquires an angular velocity of 220.0 rad/s while subject to a constant torque from a motor for 5 s. a. What is the angular acceleration of the flywheel? b. What is the magnitude of the torque?

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5. A particle is moving along a circular path of radius 1.5 m and has an angular velocity of 10 rads/s. What is the particle's radial acceleration? What is the particle's tangential velocity?

1. A point on the outer rim of a hollow disk (I = mr2) with radius r and mass m rotates with a constant angular speed of ω. How far will the point travel (in meters) in 1 minute of rotation? Let w=11.5 rad/s and r=0.78m a. how many revolutions will the point experience during this time? b. What net torque is necessary to stop the disk in time t? Let t=7 sec and m =14kg

6. A ball on a string has a moment of inertia of 14 kg · m2. It experiences a torque of 21 m N. a. What is the angular acceleration of the ball? b. The ball starts from rest. What angular velocity does it have after 3.5 seconds? c. What angular momentum does the ball have after 3.5 seconds?