Physics chapter 2-2

# Physics chapter 2-2 - 1 PHYS 101 Lecture 3 1 SUMMARY of...

This preview shows pages 1–4. Sign up to view the full content.

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

View Full Document

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 PHYS 101 -- Lecture 3 1 SUMMARY of last lecture:- simplify motion: point masses, no forces acting- relevant quantities are distance/displacement speed/velocity acceleration- graphically: displacement velocity acceleration slope slope area under curve area under curve Physics 101 – Lecture 3 One-dimensional kinematics (con’t) PHYS 101 -- Lecture 3 2 v = v + at v aver = (v + v )/2 v 2 = v 2 + 2a (x – x ) x = x + v t + ½at 2 Equations for constant acceleration : TODAY: - some examples of 1D motion- objects in free-fall: constant acceleration motion- primer on vectors to prepare us for 2-D motion 2 PHYS 101 -- Lecture 3 3 Useful collection of simple kinematics applets at: vnatsci.ltu.edu/s_schneider/physlets/main/index.shtml In particular: vnatsci.ltu.edu/s_schneider/physlets/main/kinem01.shtml PHYS 101 -- Lecture 3 4 Example Giancoli problem: 2.63: 95-m long train at constant acceleration starts from rest. Front of train has speed of 25 m/s when it passes a man standing 180 m from the place it started. What is speed of last car as it passes man? Before we start, an aside about problem solving:- it’s NOT a random procedure, casting about for an equation!- structured approach is best- I advocate a four-step procedure: - Sketch … sketch what’s known & given, with coords and symbols- Spell out … list the givens & the unknowns- Solve … find the right equation(s), solve- Sanity check … make sure units, order of magnitudes, etc… are correct 3 PHYS 101 -- Lecture 3 5 Example Giancoli problem: 2.63: 95-m long train at constant acceleration starts from rest. Front of train has speed of 25 m/s when it passes a man standing 180 m from the place it started. speed of 25 m/s when it passes a man standing 180 m from the place it started....
View Full Document

## This note was uploaded on 09/29/2011 for the course PHYS 101 taught by Professor Prof during the Fall '08 term at McGill.

### Page1 / 9

Physics chapter 2-2 - 1 PHYS 101 Lecture 3 1 SUMMARY of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online