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LN_Sec_15-5_15-7 - PRINCIPLE OF ANGULAR IMPULSE...

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PRINCIPLE OF ANGULAR IMPULSE & MOMENTUM (Sections 15.5-15.7) Today’s Objectives : Students will be able to: a) Determine the angular momentum of a particle and apply the principle of angular impulse & momentum. b) Use conservation of angular momentum to solve problems.

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(Review) LINEAR MOMENTUM AND IMPULSE Linear impulse : The integral I = F dt is the linear impulse, has units of N·s Linear momentum : The vector L = m v is the linear momentum, has units of (kg·m)/s
(Review) PRINCIPLE OF LINEAR IMPULSE AND MOMENTUM The principle of linear impulse and momentum is obtained by integrating the equation of motion with respect to time. The equation of motion can be written F = m a = m (d v /dt) Separating variables and integrating between the limits v = v 1 at t = t 1 and v = v 2 at t = t 2 results in m v 2 –m v 1 d v m F dt v 2 v 1 t 2 t 1 = =

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READING QUIZ 1. Select the correct expression for the angular momentum of a particle about a point. A) r x v B) r x (m v ) C) v x r D) (m v ) x r 2. The sum of the moments of all external forces acting on a particle is equal to A) angular momentum of the particle. B) linear momentum of the particle. C) time rate of change of angular momentum.
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LN_Sec_15-5_15-7 - PRINCIPLE OF ANGULAR IMPULSE...

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