Conservation of Charge
Conservation of Energy
Conservation of Angular Momentum
Inelastic Collisions
Elastic Collisions
Conservation of Linear Momentum
Conservation
Laws
BEU: 1 ft-lb
CGS: 1 erg = 1 dyne cm = 1 g cm² / s²
MKS: 1 Joule = 1 N m = 1 kg m² / s²
units:
W = F ⋅ r = F r cos θ
W = ∫ F dr
Force acting through a distance in the direction of motion
Work
BEU: 1 hp = 550 ft-lb / s = 746 W
CGS: 1 erg/sec
MKS: 1 Watt = 1 Joule / second = 1 kg m² / s³
units
P = d W / dt
The rate at which work is done (or the rate at which energy is consumed or generated)
Power
Energy unit are work units
E = K + U
Total
Mechanical
Energy
Us = ½ k x²
spring:
Ug = G m1m2 / r
gravitational-2:
Ug = mgh
gravitational-1:
Potential
Energy = U
K = ½ mv²
Kinetic
Energy = K
Energy =
The ability to do work
F = d p / d t
F = Δ p / Δ t
Original 2nd Law
∫ F dt = Δ p
F Δt = Δ p
Impulse equals
Change In Momentum
Impulse is
Force * Time
p = m v
Momentum is
Mass * Velocity
Impulse
Momentum
Theorem
Unit VI
Phys
1401/2425
