Phys151_PPL9

# Phys151_PPL9 - The Big Mo' Final quantity that is relevant...

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The Big Mo’ Final quantity that is relevant to concept of motion - momentum . Quantity of motion, an object on the move has it. For an object(mass m) traveling in a straight line with velocity v, its momentum (p) is m.v and is a vector . Another related quantity is the change in momentum when an object has its velocity changed through the action of a force, as in a collision. We call this the impulse (I) of the force. I = m.v f - m.v i = p f - p i Introducing these two quantities (p and I) yields some immediate benefits in understanding a number of motional phenomena. m v p = m.v

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On Impulse Why is skiing into a cement wall more painful than skiing into a bank of snow? Consider this. During the collision, a force acts for a short time and causes a change in momentum. Impulse = change in momentum I = m.v f - m.v i = m.(v f - v i ) = mass x change in vel.
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## This note was uploaded on 08/31/2009 for the course DRXL 100 taught by Professor All during the Spring '09 term at Drexel.

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Phys151_PPL9 - The Big Mo' Final quantity that is relevant...

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