Question

From rest, a car accelerates to 4.2 m/s2 for 10 seconds before winning the race. How far did it run?

Write the final answer in complete sentence.

Answer 1

`s = ut + (1)/(2) a {t}^(2) \\ u = 0 \\ a = 4.2 \: m {sec}^( - 2) \\ t = 10sec \\ s = 0 + (1)/(2) (4.2) {10}^(2) \\ = 1.2 * 100 \\\boxed{ s = 120 \: m}`