Question

Someone in a car going past you at the

speed of 45 m/s drops a small rock from a
height of 2.1 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 Answer in units of m.

Answer 1

The rock hits the ground 29.25 m far from the point of drop.

Step-by-step explanation:

We know,

s = ut + 1/2 at²

to find the time taken for the rock to hit the ground, where u is 0 and a = g,

2.1 = 4.9t²

t = 0.65

The horizontal distance covered in this time:

distance = speed x time

d = 45 x 0.65

d = 29.25 m