Physics_Momentum Notes - LINEAR MOMENTUM Momentum : a...

Download Document
Showing pages : 1 of 2
This preview has blurred sections. Sign up to view the full version! View Full Document
LINEAR MOMENTUM Momentum : a vector quantity defined as the product of an object s mass and velocity Momentum describes an objects motion p = mv The direction of the momentum is the direction of the velocity. The SI units are kilogram-meters per second (kg-m/s) IMPULSE A change in momentum takes force and time . Impulse : for a constant external force, the product of the force and the time over which it acts on an object. F t = p = m(vf –v0) In soccer for example : when the ball is moving very fast the player must exert a large force over a short time to change the ball s momentum and quickly bring the ball to a stop. Stopping times and distances depend on the impulse-momentum theorem. A change in momentum over a longer time requires less force . AN ANALOGY A mood is something you have – you are happy, sad, angry, etc. – it is a characteristic of your current state of being . In the same way, momentum is something that an object has – it is a characteristic of its current physical state
Background image of page 1
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.