26. A skater is spinning at 1 rev/s with her arms outstretched so that her moment of inertia is 2.4 kg.m^2 . She then pulls her arms to her sides which reduces her moment of Inertia to 1.2 kg.m^2 . What is her new angular velocity? A. 3.6 rev/s B. 2.0 rev/s C. 1.2 rev/s D. 0.5 rev/s

5. A Billiard Ball, radius 1.25 in and mass of 165 g , is released from rest and rolls down a smooth incline (like galileos ramp…) that is 8 ft long. The incline has a height of 4 in going to 0 inches in 8 ft. There I no slipping. The Q’s are… a. How many revolutions did the ball make going down the incline? b. What was the angular acceleration of the ball? c. What was the tangential acceleration of the ball? d. What’s the difference? If you could clearly circle the answers I need that would be great!! Thanks!

Suppose the rotational kinetic energy of a solid disk is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia? If the mass of the disk is 50 kg, what must be its radius? moment of inertia: A. 276.5 kg-m? B. 222.2 kg-m? D. 238.5 kg-m? E. 239.2 kg-m? С. 175.9 kg-m? F. 170.3 kg-m? /--/ radius: А. 2.490 m D. 2.536 m В. 2.981 m Е. 3.341 m С. 3.212 m F. 3.195 m

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