a) The car starts from rest therefore the initial speed u = 0. Nothing is said about the initial position and we therefore assume it is equal to 0. Hence the position x is given by the equation
x = (1/2) a t 2
where a is the acceleration (=8 m/s2) and t is the period of time between initial and final positions
x = (1/2)8 (10)2 = 400 m
b) The velocity v of the car at the end of the 10 seconds is given by
v = a t = 8 * 10 = 80 m/s
