Fundamental Equations of Dynamics
KINEMATICS '
Particle Rectilinear Motion
Variable a Constant a = ac
dv'
— ’U=’Uo+act
v=— s=s0+vot+%act2
dt
ads=vdv v2=vﬁ+2ac(s—s0)
Particle Curvilinear Motion
x, y, z Coordinates r, 9, z Coordinates
ar=r —ré2
ag=ré +2r0
a

Formula Sheet for Physics 131
conversion factors: 1 km = 1000 m, 1 m = 100 cm, 1 in = 2.54 cm, 1 mile = 1610 m
acceleration due to gravity at Earths surface: g = 9.8m/s2
Kinematics in three dimensions:
three-dimensional position vector ~r = xi + yj + z k:

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DIAMETRAL PITCH
SPUR GEARS
TO GET
Module
HAVING
Pressure angle
FORMULA
Diametral pitch
Divide 25.4 by
the diametral
pitch
m = 25.4 / Pd
Module
Divide 25.4 by
the module
Pd = 25.4 /

SPUR GEAR
Submitted to: Miss
Maliha Azhar
MACHINE DESIGN 2
MC-5
GROUP MEMBERS
Naveed Javaid Butt
Ali Raza Shabbir
Shakeel Ahmed
M.Touseef
Hafiz Ali Raza
Muddassar Latif
TOPICS UNDER LIGHTS
SPUR
GEARS
1. Definition and Introduction
By Naveed Javaid Butt
2.

Chapter 8 Kinematics of Gears
Gears!
Gears are most often used in transmissions to convert an electric motors high speed
and low torque to a shafts requirements for low speed high torque:
Speed is easy to generate, because voltage is easy to generate
Torq

MODULI OF ELASTICITY AND POISSONS RATIO
Modulus of elasticity E
Shear modulus of elasticity G
ksi
GPa
ksi
GPa
Poissons
ratio v
10,000- 11,400
10,600
10,000
10,400
70-79
73
70
72
3,800-4,300
4,000
3,800
3,900
26-30
28
26
27
0.33
0.33
0.33
0.33
Brass
14,000