Question

To see how deep a well is you drop a rock in. The rock hits the water 10 seconds later.

How deep is the well? Draw the velocity-time graph for this motion.

Answer 1

490m

Step-by-step explanation:

Given parameters:

Time taken = 10s

Unknown:

Depth of the well = ?

Solution:

To find the depth of the well, we apply the appropriate motion equation:

h = ut +
`(1)/(2)`gt²

h is the depth

u is the initial velocity

g is the acceleration due to gravity = 9.8m/s²

t is the time taken

Input the parameters and solve;

The ball was dropped from rest; u = 0

h =
`(1)/(2)`gt²

h =
`(1)/(2)` x 9.8 x 10² = 490m