
Originally Posted by
Mike White
A ball sitting on the roof has potential energy depending on how far the ball could fall.
PE = m * g * h.
m = mass,
g = gravity
h = height.
Once the ball makes contact with the lane, it is at the lowest point it's going to achieve (h = 0), there is no potential energy in the ball.
PE = m * g * h, and since h = 0, PE = 0;
What you are thinking of is different forms of kinetic energy
One form is linear momentum where KE(v) = 1/2 * m * v^2
m = mass
v = velocity
Linear momentum can be further broken down into length wise momentum, and cross wise momentum.
Another from is angular momentum where KE(a) = 1/2 * I * w^2
I = moment of inertia
w = radians per second (a form of rev rate)
The total kinetic energy would be the sum of both forms. KE = KE(v) + KE(a)
KE will stay constant throughout the shot, until the ball makes contact with the pins.
Once the ball encounters friction, the balance between KE(v), and KE(a) will change, but the sum will remain the same.
Bookmarks