Physics Formula Flashcards
Work / KE Theorem
W (total) = Delta KE
Centripetal Acceleration
a (c) = ( V^2 / r )
Centripetal Force
F (c) = M * a (c) = ( m * v^2 / r )
UCM velocity Formula
v = sqrt{ ( G*M / r ) }
The formulas for when a ball is on the top and bottom of a rotation (for a ball rotating in a vertical circle)
Top: T + m*g = ( m * v^2 / L )
Bottom: T - m*g = ( m * v^2 / L )
Formula to find the min v to keep a ball in a vertical circle “orbit”
v (min) = sqrt{ g * L }
Units for angular displacment
S / R = theta “0”
[Radians]
Units for Angular velcoty
( change in theta / change in time) = “w”
[rads / second]
Units for angular acceleration
(change in angular velocity / change in time) = alpha
[rad / second^2]
a (T) / r
Formula for center of mass/gravity
( ( m1x1) + (m2x2) + … ) / ( m1 + m2 + … ) )
Formula for Torque
T = F * r * sin0 [NM]
Formula for work
W = F * d * cos 0 [J] (scalar)
J = N*M
Formulas for the Work due to gravity
When on a slope
Normal
Wg = m*g * sin0 * L
Wg = m*g * h
Formula for Power
P (avg) = work / time
Power formula for a Constant Force
P = F * v * Cos(0) = F (parallel) * v
Formula for W (total)
W (total) = change KE
Relation of PE to work from gravity
Delta PE = - W (g)
Formula shortcut for velocity using PE/KE
v = sqrt{ 2 * g * h }
Formula for Impulse
J = (F(avg) * change time) = (m * delta v)
Reserved for recoil and collisions
Formula for Impulse
J = F(avg) * change time
Reserved for recoil and collisions
Formula for impulse of two movable objects
P(1, o) + P(2, o) = P(1, f) + P(2, f)
A collision is ELASTIC if
KE is conserved
A collision is INELASTIC if
KE is NOT conserved.
ie: two objects combine
