Question

A car drops off a cliff that has a height of 700m. How long does it take for the car to hit the ground?

Answer 1

We can find the time that the car takes to hit the ground from the kinematic equation:

$$y=\dfrac{1}{2}gt^2,$$ $$t=\sqrt{\dfrac{2y}{g}}=\sqrt{\dfrac{2\cdot 700\ m}{9.8\ \dfrac{m}{s^2}}}=11.95\ s.$$

Answer:

$t=11.95\ s.$