LESSON 6

PHYS 1100 LESSON 6 FOR
THURSDAY, AUGUST 12, 2010

I Introduction

II Logistics

III Turn in Assignments Due: Homework 1, 2, Essay 1, 2, etc. and Return of Papers

IV Test 2

V Mind Game 2

VI Review of Lesson 5: Hooke's Law, Energy, Work, Momentum

F = - k x
F = - k y = m g

Energy: heat, light, mechanical, acoustical, etc.

Kinetic, Potential, ….

Work / Energy < 1

F x d = energy, units 1.0 N-m == Joule

4.186 calorie = 1 joule

Momentum = energy of motion

p = m v

Dp = 0 in a closed system

E = F x d (in Joules)
PE = m g h (in Joules)
KE = ½ m v2 (in Joules)
p = m v (in kg m/s)
Ff = m m g (friction)

VII Lesson 6: Momentum, Impulse, Conservation, Angular Momentum

p = m v

S p = constant in a closed system, or,

Dp = 0 in a closed system

F Dt = Impulse, but same units as momentum

l = m v r = p r this is angular momentum

t = r x F this is torque

VIII Laboratory Exercise 6: Hooke's Law


IX Homework Assignment 3: Read Chapters 10-14 and do Problems 1, 3, 9, 13, 19, 25, 29, 31, 39, 53, 63, and 65 on pp 323-327; Problems 1, 3, 9, 13, 19, 25, 29, 31, 39, 53, 63, 65 and 77 on pp 366-371; Problems 1, 3, 9, 13, 19, 25, 29, 31, 39, 53 and 63 on pp 409-412; Problems 1, 3, 9, 13, 19, 25, 29, 31, 39, 53, 63, and 65 on pp 445-448; and Problems 1, 3, 9, 13, 19, 25, 29, 31, 39, 53, 63, 67, 69, and 77 on pp 491-495; due 8/19

X Essay 3: James Prescott Joule, due 8/19