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

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2
Q

Conservation of Momentum

A

m1V1 + m2V2 = m1V1’ + m2V2’

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3
Q

Coefficient of restitution

A

e = (relative velocity after impact)/(relative velocity before impact)

e = (V2’ - V1’)/(V1 - V2)

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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

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5
Q

Work

A

Work = Force × Displacement

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6
Q

Work (if Inclined)

A

W = F × d × cos ∅

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7
Q

Energy

A

K. E. = ½ × mass × velocity²

Positive Work - Negative Work = ½ (w/g) ( V2² - V1²)

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