A penny is dropped from a window and takes 1.82s to reach the ground. From what height was it dropped.

h=gt^2/2

g=not given

g is gravity (9.8m/s^2)

To find the height from which the penny was dropped, we can use the equation of motion:

h = (1/2) * g * t^2

where:
h is the height (unknown)
g is the acceleration due to gravity (9.8 m/s^2 on the surface of the Earth)
t is the time it takes to reach the ground (1.82 seconds)

Substituting the given values, we have:

h = (1/2) * 9.8 * (1.82)^2

Calculating this expression, we get:

h ≈ 16.91 meters

Therefore, the penny was dropped from a height of approximately 16.91 meters.