Asmall ball with mass 1.20 kg is mounted on one end of a rod 0.860 m long and of negligible mass. the system rotates in a horizontal circle about the other end of the rod at 5100 rev/min.
(a) calculate the rotational inertia of the system about the axis of rotation.
(b) there is an air drag of 2.60 x 10.

The cheetah is considered the fastest running animal in the world. cheetahs can accelerate to a speed of 20.1 m/s in 2.50 s and can continue to accelerate to reach a top speed of 28.1 m/s. assume the acceleration is constant until the top speed is reached and is zero thereafter.1) starting from a crouched position, how long does it take a cheetah to reach its top speed? (express your answer to three significant figures.) s2) how far does it travel in that time? (express your answer to three significant figures.) m3) if a cheetah sees a rabbit 120 m away, how long will it take to reach the rabbit, assuming the rabbit does not move? (express your answer to three significant figures.)