Two different objects are 3 meters from the reference point on a graph and share the same y-coordinate. Choose the TRUE statement.
A. Their positions are 6 meters apart.
B. They must have the same position.
C. They must have the same x-coordinate value.
D. A line between them would need to be horizontal.

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 8.13 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 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2