A 10 kg cylindrical barrel with a radius of 0.5 m rotates about a vertical axis of rotation without displacing with an initial angular velocity of 4 rad/s. The rotational inertia of the cylindrical barrel is 0.3mr2 and rain begins to fill the barrel with water as its rotating. If the barrel accumulates 4 kg of water, calculate the new angular velocity of the barrel.

A figure skater performs a twisting jump. She rotates around her longitudinal axis 2 times in 0.65 s.  What was her average angular velocity in radians/second? A   720rad/s  B   19.3rad/s C   4? rad/s D   9.67 rad/s E   1107 rad/s

A Ferris wheel has a radius of r = 15 m and makes one complete rotation every T= 43 s. There is a rider on the Ferris wheel of mass m = 54 kg. 25% Part (a) Enter an expression for the angular speed of the rider in terms of the defined quantities. A 25% Part (b) Calculate the angular speed of the rider, in radians per second. A 25% Part (c) Enter an expression for the tangential speed of the rider, in terms of the quantities defined in the problem statement. 25% Part (d) Calculate the rider's tangential speed, in meters per second. m Otheexpertta.com

The rotational inertia of a disk about its axis is 8.3kg. m². When a 3.2 kg weight is added to its rim, 9.7 m from the axis, the rotational inertia becomes: Answer: