Basic Physics. Velocity versus Speed Newton’s 2 nd Law Gravity Energy Friction as Non-conservative Force. Velocity versus Speed.
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Velocity versus Speed
Newton’s 2nd Law
Friction as Non-conservative Force
F = -mgj
where g is the magnitude of gravity near the surface of the earth, g=9.81m/s2.
(m=mass, v=velocity, I=moment of inertia, ω=angular velocity)
(g=gravitational acceleration near the earth’s surface, h=height)
½mvf2 + ½Iωf2 + mghf = ½mvi2 + ½Iωi2 + mghi
μ = coefficient of friction, N = normal force