The position of a car as a function of time is given by x= (50m) + (-5.0 m/s)t + (-10 m/s2)t2(a) What are the initial position, initial velocity, and acceleration of the car? (b) plot x versus t for t=0 to t=2 s (c) What distance does the car travel during the first 1.0 s? (d) What is the average velocity of the car between t=1.0 s and t=2.0 s?

An atom that has gained or lost electrons is called an _

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

Mackinzie walks 4 blocks west, then 2 blocks south, then 4 blocks east, and, finally, 1 block south. what is the magnitude of her total displacement duringthis walk (in blocks)?