ENERGY
Energy is the ability
to do work
Potential energy (Ep)
The energy a body has due to its
position or configuration.
+
GRAVITATIONAL
ELASTIC
ELECTRO-MAGNETIC
[ The force acting on the body must be able
to move the body in the direction of a
component
CIRCULAR
MOTION
REMEMBER :
The
curved path of a
projectile was due to a force
(gravity) acting on a body in
a direction NOT parallel to
its line of motion.
CIRCULAR MOTION is due
to a net force acting
perpendicular to its line of
motion (radially inward)
p
F
VECTOR
S
v
Scalar quantities
quantities that can be completely
described by a number with the
appropriate units.
(They have magnitude only. )
Such as length, mass, speed,
energy, temperature
cfw_notation : d, m, v, E, to
Vector quantities
quantitie
Newtons
Laws of
Motion
DEFINITION
DEFINITION
Force a physical quantity
that can affect the state of
motion of an object. (such
as a push or a pull)
m
F
Newtons First Law
(Law of Inertia)
If
If there
there is
is no
no net
net force
force acting
acting on
o
KINEMATICS
The study of motion
Translational
Rotational
Vibrational
DEFINITIONS
Distance, d change in
position.
Displacement, d Change in position in
a particular direction.
NOTE ON DELTA NOTATION :
INDICATES THE CHANGE IN A QUANTITY.
d d1 d 0
or
d fi
2 Dimensional
Kinematics
PROJECTILE MOTION
PROJECTILE MOTION
The trajectory (path) of a projectile is parabolic.
The vertical motion determines the time of flight.
PROJECTILE MOTION
The horizontal motion is uniform. (aX = 0 m/s2)
Vertical motion is accele
SHP
NT
ME
MO
UM
Momentum, p
- The product of the mass of a
body and its velocity.
p = mv
From Newtons Law of Acceleration :
F = ma
Ft = mv
F=m
v
t
cfw_impulse = cfw_change in momentum
J
=
p
LAW OF CONSERVATION OF
MOMENTUM
When no external forces act on a
GRAVITATION
NEWTONS LAW OF
ThereGRAVITATION
is an attractive force
between any two bodies which is
directly proportional to the
product of their masses and
inversely proportional to the
square of the distance between
their centers of mass.
NEWTONS LAW
OF
SHP
A REVIEW OF SOME
CHARACTERISTICS OF FORCES
1. A net force will change the state of mo
of a body. (per Newtons 2nd law)
2. Forces can be exerted through long
distances. (ex: gravity and electro-magnet
3. Forces always occur in pairs.
(per Newtons 3rd l
Work and Power
W
F
d
Work
The energy expended when a force acts
on a body causing that body to move in
the direction of a component of the force.
Work equals the product of the
displacement and the component of the
force in the direction of the displaceme
SHP
DYNAMICS
The
application of Newtons Law
of Acceleration to Kinematics.
F=ma
v
a
t
d
v
t
d=v0t + at2
2
0
v1 v 2ad
v1=v0 + at
EQUILIBRIUM
VS. DYNAMICS
v = constant
a=0
v constant
a0 cfw_
usually a
constant
F=0
F = ma
Fx =0 Fy =0 Fx =max Fy =0
FL =
PHYSICS
Introduction
HOT SITES
WWW.GEOCITIES.COM/SHPMRWILHELM
SCIENCE.GLENCOE.COM
Mass
The measure of a bodys inertia
m
M
Inertia
The resistance to any change in a
bodys motion.
m
M
Weight
The amount of gravitational force
acting on a body.
Force
A p