Physics Equations Flashcards
Gravitational Force
F = mg
Units: N
Electrostatic Force
F = kQq/r^2
Units: N
Kinetic Energy
KE = 1/2 * mv^2
Units: J
Potential Energy
PE = mgh OR PE = kQq/r
Units: J
Mechanical Work
W= Fdcosθ
Units: J
Translational Motion
The Big 4
d = vi*t + 1/2 at^2 d= (vi + vf / 2) * t vf= vi + at vf^2 = vi^2 + 2ad
cos90
= sin 0
= 0
cos60
=sin30
= sqrt(1) / 2
cos45
= sin45
= sqrt (2) / 2
cos30
= sin60
= sqrt (3) / 2
cos0
= sin90
= 1
Vf =
= vo + at
Vf^2 =
= vo^2 + 2ad
d =
= vi*t + 1/2 at
= (vi + vf / 2) * t
F =
= ma
= -kΔx
Fg =
GMm/r^2
Mechanical Advantage =
= Fout / Fin
Efficiency =
= Wout / Win
F =
= -kΔx
= ma
Ff =
= uFn
t =
r Fsin θ
KE =
1/2 mv^2
P =
W / t
Wnet =
ΔEk
W =
F d cosθ
Espring =
1/2 kx^2
Egrav =
mgh
VoSinθ
= sqrt (2 g h)
= Vyi
VoCosθ
= Vxi
= Vxf
Vy @ max h
= 0 m/s
ax
= 0 m/s
ay
= - 10 m/s
F applied
= T1 = T2 = T3
= 1/3 (Mg)
T1 + T2 + T3
= Mg
Mechanical Advantage (of T1, T2, T3)
= Mg / F applied
= 3 / 1
Angular Frequency of an Oscillating Spring
w = sqrt ( k / m)
Where k is the spring constant (stiffness)
Amplitude of a Spring Oscillation
= 1/2 mv^2 + mgh
Total Mechanical Energy of a Springs system
= 1/2 kx^2 + mgh
Hooke’s Law
F = -kx
(the restoring force in a spring is linearly related to the degree of displacement from the equilibrium position of the spring)
