Lecture6_Fall2008

Lecture6_Fall2008 - Chapter 6 Homework Chapter 6 Work and...

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1 Chapter 6: Work and Energy Plan 1. Linear Momentum and Impulse 2. Mechanical Energy: Kinetic Energy Potential energy 3. Work and Power 4 . Work-Energy Theorem 5. Law of Conservation of Mechanical Energy Chapter 6: Homework z Key Terms and Matching Definitions z Review Questions: 1, 3, 5, 8, 9, 12 z Exercises: 1, 3, 4, 10, 20. z Problems: 1, 3, 5, 7, 8 ¾ MOMENTUM= MASS × VELOCITY or, in shorthand notation, p=mv ¾ Impulse = force × time interval or Impulse= F Δ t ¾ Impulse = change in momentum or Ft = Δ mv 1. Linear Momentum and Impulse Linear momentum, impulse and the Newton’s Second Law ¾ Newton’s Second Law F=ma ¾ ¾ Acceleration a V t Δ ⇒= Δ V Fm t or F t m V impulse changeof momentum Δ = Δ Δ= Δ ⇒ =
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2 2. Mechanical Energy z Energy is ability to do work! z Energy is measured in joules. There are two forms of mechanical energy: ¾ Kinetic energy ¾ Potential energy Kinetic energy Definition Kinetic Energy = ½ mass × speed 2 2 1 2 KE mv = Kinetic Energy z Kinetic energy (KE) is energy of motion possessed by moving object.
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Lecture6_Fall2008 - Chapter 6 Homework Chapter 6 Work and...

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