Physics equations

force times displacement

work (J)

½ mv squared

kinetic energy (J)

MGY

Potential Energy gravitational

½ kx squared

spring potential energy

p=mv

linear momentum

change in linear momentum

impulse

m1v1 + m2v2 = (m1 + m2) vf

inelastic collision

v2f - v1f = - (v2i - v1i)

elastic collision both moving before collision

v1f = m1-m2/ m1+m2 V1i

m 2 at rest before collision ***

w = change in theta/ change in t

angular velocity

change in w / change in t

angular acceleration

S = r theta

arc length

Vt = rw

tangential linear velocity

r alpha

tangential acceleration

Ac= rw squared

changes in direction of a circle

I/2 Iw squared

rotational KE

I = mr squared

inertia

I = Icm + Md squared

moment of inertia

Force times r

torque

linear momentum

equal to the effort needed to stop an object

torque definition

when a force causes a rotation