05-07: Impulse-Momentum, Conservation of Moment, and Work-Energy Flashcards
1
Q
Impulse - Momentum Equation
A
Summation of Fx (t) = m (Final Velocity - Initial Velocity)
m=w/g
2
Q
Conservation of Momentum
A
m1V1 + m2V2 = m1V1’ + m2V2’
3
Q
Coefficient of restitution
A
e = (relative velocity after impact)/(relative velocity before impact)
e = (V2’ - V1’)/(V1 - V2)
4
Q
Average impact force for a certain time “t” of contact
A
F × t = m2 (V2’ - V1)
F × t = m1 (V1’ - V1)
F = Average Impact Force
F × t = Impulse
5
Q
Work
A
Work = Force × Displacement
6
Q
Work (if Inclined)
A
W = F × d × cos ∅
7
Q
Energy
A
K. E. = ½ × mass × velocity²
Positive Work - Negative Work = ½ (w/g) ( V2² - V1²)
