Question

As part of a movie stunt, a full-size remote-controlled car is driven horizontally off a 9.81 m tall cliff at 18.34 m/s. How long does it take the car to hit the ground below? time to hit the ground= *Round your answer to the nearest thousandth if necessary.

Answer 1

t = 1.414 seconds

Step-by-step explanation:

`y_(f) = y_(i) + v_(i)*t +0.5*a*t^2\\y_(f) = y_(i) + 0.5*a*t^2\\(y_(f) - y_(i)) = 0.5*a*t^2\\t = \sqrt{(2*(y_(f)-y_(i)))/(a) } \\t = 1.414 seconds`