Atruck on a straight road starts from rest and accelerates at 1.4 m/s 2 until it reaches a speed of 22 m/s. then the truck travels for 22 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 4.4 s. how long is the truck in motion?

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