An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 7.64 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.900 m, he is able to rotate the ball only 6.13 rev/s. (a) Which rate of rotation gives the greater speed for the ball? O 6.13 rev/s O 7.64 rev/s (b) What is the centripetal acceleration of the ball at 7.64 rev/s? m/s2 (c) What is the centripetal acceleration at 6.13 rev/s? m/s2

I am having trouble with a 3 d motion problem. The problem is as follows, "A point on a rotating turntable 20.0 cm from the center accelerates from rest to a final speed of 0.600 m/s in 1.80 s. At t = 1.29 s, find the magnitude and direction of each of the following." The problem asks me to find the radial acceleration, the tangential acceleration, and the total acceleration of the point. Thanks for the help.

A rectangular Plate is rotating with a constant angular speed about an axis that passes perpendcularly sthrough one corner.  The centripetal acceleration measured at a corner A is n times as great times as that measured at corner B. What is the ratio L1/L2 of the lengths of the sidse of the rectangle when n=3.95

A wheel of radius 15cm begins to rotate on its axis from rest with a constant angular acceleration of 6.5 rad / s ^ 2. At t = 5 seconds, its centripetal acceleration in m / s ^ 2 is: a) 158.4b) 97.5c) 6.34d) 282

How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to experience an acceleration of 117000 g's? If the answer has 4 digits or more, enter it without commas, e.g. 13500.