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# Lect14 - Physics 101 Lecture 14 Impulse and Momentum q...

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Physics 101: Lecture 14, Pg 1 Physics 101: Physics 101: Lecture 14 Lecture 14 Impulse and Momentum Impulse and Momentum Today’s lecture will cover Chapter 7.1 - 7.2

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Physics 101: Lecture 14, Pg 2 Impulse and Momentum Impulse and Momentum Consider a ball hit by a baseball bat: At t=t 0 : ball approaches bat with initial velocity v 0 At t=t f : ball leaves the bat with final velocity v f During the time interval t=t f -t 0 the ball is hit by the bat, i.e. the bat exerts an average force F ave on the ball. To describe the effect of such a time-varying force on the motion of an object we introduce two new concepts: Impulse and Momentum
Physics 101: Lecture 14, Pg 3 Impulse and Momentum Impulse and Momentum The effect on the motion of an object when a time- varying force is applied will be the larger the longer the force is acting on the object and the larger the larger the force. This observation is described by the concept of impulse: J = F ave t SI unit: N s To describe the response of an object to a given impulse we need the concept of linear momentum: p = m v SI unit: kg m/s

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Lect14 - Physics 101 Lecture 14 Impulse and Momentum q...

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