lecture26 - Momentum Newtons original quantity of motion a...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Physics 1D03 - Lecture 25 Momentum • Newton’s original “quantity of motion” • a conserved quantity • a vector Serway 9.1 – 9.3 -momentum and impulse -Newton’s Second Law in another form Today: Practice problems: Chapter 9, problems 3, 7, 9, 11 Physics 1D03 - Lecture 25 (We say “linear” momentum to distinguish it from angular momentum , a different physical quantity.) Definition: The linear momentum p of a particle is its mass times its velocity: Momentum is a vector , since velocity is a vector. Units: kg m/s (no special name). p total = p 1 + p 2 + . .. = m 1 v 1 + m 2 v 2 + . .. The total momentum of a system of particles is the vector sum of the momenta of the individual particles: ( Note we are adding vectors .) p m v
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Physics 1D03 - Lecture 25 dt ) v d(m dt v d m a m F r r r r = = = Σ dt p d F Σ r r = Newton’s Second Law If mass is constant, then the rate of change of ( m v ) is equal to m times the rate of change of v . We can rewrite Newton’s Second Law:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/13/2011 for the course PHYSICS PHYSICS 1D taught by Professor Mckay during the Fall '09 term at McMaster University.

Page1 / 6

lecture26 - Momentum Newtons original quantity of motion a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online