Question

1. If a rock is dropped from a 600 meter cliff, how long will it take to hit the ground?
Dl

Answer 1

11.1s

Step-by-step explanation:

Given parameters:

Height of cliff = 600m

Unknown:

How long it takes to hit the ground = ?

Solution:

To solve this problem, we use one of the kinematics equation;

H = ut +
`(1)/(2)`gt²

H is the height

u is the initial velocity = 0m/s

t is the time taken

g is the acceleration due to gravity

600 =
`(1)/(2)` x 9.8 x t²

600 = 4.9t²

t² = 122.5

t = 11.1s