With an initial velocity of 20 km/hr a car accelerates 8 m /s? for 10 seconds what will be the: position of the car at 10 seconds? b ) velocity of the car at the end of 10 seconds? () distance the car travels in the ST second? A computer disc 8 inches in diameter is initially at rest. A small dot is marked of the edge of the disc. The disc acce lera at 600 rad / s? for 0.5 seconds and then coast at a steady angular speed for another .S seconds. a) what is the speed of the dot at t= 1 second? 5) How many revolutions has the disc turned ? A skater with an initial speed of 7.4 m/s stops propelling himself and begins to coast across the ice, eventually coming a rest. The coefficient of friction between the blades and the ice is 0- 1 . a ) what is the deacceleration jak ? b) How far will the skater travel before coming to a rest