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

atomic = no of protons.

mass number-atomic number = neutron number

i think the answer would be b