90 points whats the equation for how fast something will be traveling before it hits the ground. how to do the equation explain here is an example problem
a 0.05 kg-coin is dropped from the top of a skyscraper that is 100 meters high. how fast is the coin traveling just before it hits the ground?
use gpe=m*g*h
ke= 0.5*mass *velocity squared

I will solve it using a different set of equations from kinematics. The same principles are the same but the equations look different. Specifically

final velocity^2 = initial velocity^2 + 2(acceleration)(displacement)

In this example, the coin has no initial velocity, acceleration is by gravity and the displacement is 100m

final velocity^2 = 0 + 2(9.8)(100)=1960

final velocity = (1960)^(1/2) = 44.3m/s

double the distance = divide strength by 4

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.