A ball having a mass of 500 grams is dropped from a height of
9.00 meters. What is its kinetic energy when it hits the ground?
A. 4.4 x 10^3
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Hi @jms4323 :)
It's been a while since I've tried doing a Physics problem
but I think the Equation you need is the one that Converts Potential Energy into Kinetic Energy
m*g*h = (1/2)*m*v^2
because the Ball starts at a certain height above the ground
which means that it has Potential Energy
In this case, the Kinetic Energy would be equal to the Potential Energy because no energy should be lost
does that make sense so far? :)
this means that
KE = mgh
m = mass
g = gravity (acceleration)
h = height
but be careful!
the units for each should be
mass = kilograms
gravity = meters per seconds squared
height = meters
as we can see, the Mass that they gave us is Not in the kilograms that we need!