Question

A stone is dropped from a tower 100 meters above the ground. The stone falls past ground level and into a well. It hits the water at the bottom of the well 5.00 seconds after being dropped from the tower. Calculate the depth of the well. Given: g = -9.81 meters/second2

Answer 1

use one of the equations for motion under gravity
t = 5 , g = 9.81, s (distance) is to be found

s = (1/2) g t^2

To find depth of the well subtract 100 from s.

Answer 2

so what is s/how do I get s

Answer 3

replace g by 9.81 and t by 5 in the above equation and work it out

Answer 4

(1/2)9.81(5^2)

Answer 5

yes correct so far
now do the multiplication

Answer 6

1/2 * 9.81 * 5^2

Answer 7

122.625?

Answer 8

yes
that is the distance from top of the tower to the bottom of the well, So to find the depth of the well you subtract 100 m from it.

Answer 9

22.625

Answer 10

thats correct

Answer 11

OK?

Answer 12

22.5 meters



50.7 meters



100 meters



110 meters



152.45 meters

Answer 13

I think the top one im I right?

Answer 14

yes thats the closest