A 80kg person sits 2m from the center of the rotating platform and the platform has a tangential speed of 3m/s. How much centripetal force is required to keep that person rotating on the platform?   A. 360N   B. 17.77N   C. 120N   D. 360 LBS

2.) A spinning, flat disk of radius 2.0 m has a tangential velocity at its edge of 4.5 m/s. a. Consider a point 0.33 meters from the axis of rotation. Find the tangential velocity there? b. Find the angular velocity at the edge of the disk. c. Find the angular velocity at that point 0.33 m from the axis of rotation. d. Find its centripetal acceleration at the edge. e. Using "b." above find in radians how far the point on the edge travels in 15 s.

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 child pushes a 1.5 kg solid cylinder of radius 0.40 m causing it to roll on the ground at 8.8 m/s. The cylinder reaches a hill and rolls up the hill before coming to a stop. His mother, having recently taken a physics class in a community college determines the height reached by the cylinder. The height reached by the cylinder is a. 3.7 m b. 1.2 m c. 4.2 m d. 5.9 m