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SOLUTIONS MANUAL for elementary mechanics & thermodynamics
Professor John W. Norbury
Physics Department
University of Wisconsin-Milwaukee
P.O. Box 413
Milwaukee, WI 53201
Jutoh 1 30 ubkg download free. November 20, 2000
2
Contents
1 | MOTION ALONG A STRAIGHT LINE | 5 |
2 | VECTORS | 15 |
3 | MOTION IN 2 & 3 DIMENSIONS | 19 |
4 | FORCE & MOTION - I | 35 |
5 | FORCE & MOTION - II | 37 |
6 | KINETIC ENERGY & WORK | 51 |
7 | POTENTIAL ENERGY & CONSERVATION OF ENERGY 53 | |
8 | SYSTEMS OF PARTICLES | 57 |
9 | COLLISIONS | 61 |
10 ROTATION | 65 | |
11 ROLLING, TORQUE & ANGULAR MOMENTUM | 75 | |
12 | OSCILLATIONS | 77 |
13 | WAVES - I | 85 |
14 | WAVES - II | 87 |
15 TEMPERATURE, HEAT & 1ST LAW OF THERMODY- | ||
NAMICS | 93 | |
16 KINETIC THEORY OF GASES | 99 | |
3 |
5
6 | CHAPTER 1. MOTION ALONG A STRAIGHT LINE |
1.The following functions give the position as a function of time:
i)x = A
ii)x = Bt
iii)x = Ct2
iv)x = D cos !t
v)x = E sin !t
where A; B; C; D; E; ! are constants.
A)What are the units for A; B; C; D; E; !?
B)Write down the velocity and acceleration equations as a function of time. Indicate for what functions the acceleration is constant.
C)Sketch graphs of x; v; a as a function of time.
SOLUTION
A)X is always in m.
Thus we must have A in m; B in m sec°1, C in m sec°2.
!t is always an angle, µ is radius and cos µ and sin µ have no units. Thus ! must be sec°1 or radians sec°1.
D and E must be m.
B)v = dxdt and a = dvdt . Thus
i) v = 0 | ii) v = B | iii) v = Ct |
iv) v = °!D sin !t | v) v = !E cos !t |
and notice that the units we worked out in part A) are all consistent with v having units of m¢ sec°1. Similarly
i) a = 0 | ii) a = 0 | iii) a = C |
iv) a = °!2D cos !t | v) a = °!2E sin !t |
7 | |||
C) | i) | ii) | iii) |
x | x | x |
t | t | |
t | ||
v | v | v |
t | t | t |
a | a | a |
t | t | t |
8 | CHAPTER 1. MOTION ALONG A STRAIGHT LINE |
iv) | v) |
Photo Mechanic 6 Manual Pdf
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0 | ||||||
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v | 0 | |||||
-0.5 Minecraft 1 14 4. | ||||||
-1 | 1 | 2 | 3 | 4 | 5 | |
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t |
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t |
9
2.The Øgures below show position-time graphs. Sketch the corresponding velocity-time and acceleration-time graphs.
x | x | x |
t | t |
t |
SOLUTION
The velocity-time and acceleration-time graphs are:
v | |
t | t |
a |
10 | CHAPTER 1. MOTION ALONG A STRAIGHT LINE |
3.If you drop an object from a height H above the ground, work out a formula for the speed with which the object hits the ground.
SOLUTION | |||
v2 = v02 + 2a(y ° y0) | |||
In the vertical direction we have: | |||
v0 = 0, | a = °g, | y0 = H, | y = 0. |
Thus | |||
v2 = 0 ° 2g(0 ° H) | |||
= | 2gH | ||
) v | = | p | |
2gH |
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