A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 700 rad/s^2 for 1/2s, then coasts at a steady angular velocity for another 1/2s. What is the speed of the dot at t= 1.0 s? Through how many revolutions has it turned?

Different situation now. You re out in space, on a rotating wheel-shaped space station of radius 1159 m. You feel planted firmly on the floor , due to artificial gravity. The gravity you experience is Earth-normal, that is, g = 9.81 m/s^2. How fast is the space station rotating in order to produce this much artificial gravity? Express your answer in revolutions per minute (rpm).     106.6 rpm     0.615 rpm     0.879 rpm     0.092 rpm

A flywheel is rotating at 36.5 rev/s.What is the total angle, in radians, through which a point on the flywheel rotates in 29.7 s?

A light rod is 88 cm long. Its top end is pivoted on a low-friction horizontal axle. The rod hangs straight down at rest with a small massive ball attached to its bottom end. You strike the ball, suddenly giving it a horizontal velocity so that it swing around in full circle. What minimum speed (m/s) at the bottom is required to make the ball go over the top of the circle?   Round your answer to 2 decimal places.