A car starts from rest with a constant acceleration of 5 m/s². How much time does the car take to cover the first 160 m? A) 8 s B) 16 s C) 32 s D) 64 s

Question

Quizplus · Accepted Answer

The time can be calculated using the equation $s = ut + \frac{1}{2}at^2$, where $s = 160$ m, $u = 0$ (since the car starts from rest), $a = 5$ m/s$^2$, and $t$ is the time in seconds. Plugging the values into the equation gives $160 = 0 + \frac{1}{2} \times 5 \times t^2$, which simplifies to $t^2 = 64$. Taking the square root of both sides gives $t = 8$ s.

A Car Starts from Rest with a Constant Acceleration of 5