Chapter 2 Notes

# Chapter 2 Notes - Chapter 2 The Momentum Principle The...

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Chapter 2 – The Momentum Principle The Momentum Principle - The change of momentum of a system is equal to the net force acting on the system times the duration of the interaction - The net force acting on a system at an instant is the vector sum of all the forces exerted on the system by all the objects in the surroundings at that instant Impulse - The change of momentum of a system is equal to the net impulse applied to it - The product of a force and a time interval is called impulse Approximating Average Velocity - If the change in velocity is very small over the time interval, the final velocity can be used as an approximation of the average velocity - If the velocity is changing at a constant rate, which is the case if the net force is constant, the arithmetic average can be a good approximation Equations to Know - - - is an approximation for Momentum Change with Changing Force - If there is a significant change in force, then break into separate time intervals and calculate the total momentum

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Chapter 2 Notes - Chapter 2 The Momentum Principle The...

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