Someone in a car going past you at the speed of 24 m/s drops a small rock from a height of 2.4 m. How far from the point of the drop will the rock hit the ground? The acceleration due to gravity is 9.8 m/s^2. Answer in units of m.

Question

agent0smith · Answer

First find the time it'll take for the rock to hit the ground - the speed of 24m/s has no effect on this, as it's horizontal speed.

$$\Large h = \frac{ 1 }{ 2 } g t^2$$
h is the height, t is time. g is gravity. Find t.

agent0smith · Answer

plug in your numbers... can you solve for t?$$\Large 2.4 = 0.5 *9.8*t^2$$

agent0smith · Answer

Once you find t, then use distance = speed*time, where speed is the speed of the car, 24m/s.

anonymous · Answer

Is the answer 16.80?

agent0smith · Answer

Yes it is, sorry, got busy :)