Answer :
The distance a penny travelled before reaching the water surface is 19.6 m. Consider the acceleration of the penny as 9.8 m / s^2.
What is acceleration?
Acceleration is the rate of change of the velocity with respect to the time taken. it is a vector quantity which is seen as moving faster or happening quickly. The standard unit is metre per second squared.
The distance or depth of the well can be calculated as,
d = ut + at^2 / 2
where d = depth of the well, u = initial velocity, t = time for reaching the water, a = acceleration of the penny.
d = (0 x 2) + 0.5 (9.8) (2)^2 = 19.6 m
Therefore, the stone falls for 19.6 m when it travels for 2 seconds before hitting the water when the acceleration is 9.8 m/s^2.
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