physics equation sheet, rows 1-2

Average v

Average v = x/t = (v+v0)/2

Spring force

Fs = -kx

Weight

w = mg

Centripetal acceleration

a sub c = (4pi²r)/T² = 4pi²rf² = (angular velocity w)²r

Angular velocity w

Angular velocity w = v/r = (delta theta)/t

Work with spring

W sub s = PE sub s = ½ kx²

Work

W = delta KE

Power

P = Fv

Moment of inertia #1

I = F(delta t) = delta p

Momentum

p = mv

Angular acceleration

alpha = a/r = (delta angular velocity)/t

Angular velocity² (look to normal velocity equation for help)

(Angular velocity w)² = (Angular velocity w0)² + 2(alpha)(theta-theta0)

Moment of inertia #2

I = mr²

Torque

Torque t = rFsin(theta) = (delta angular momentum L)/t