Physics
Card Set Information
Author:
ECCammi
ID:
127723
Filename:
Physics
Updated:
2012-01-14 00:35:07
Tags:
Semester one notes
Folders:
Description:
Not as many as I thought...
Show Answers:
Length/ distance
meters (m)
Mass
Kilograms (kg)
Velocity
Meters per second (m/s)
Acceleration
Meters per second squared (m/s
^{2}
)
Momentum (p)
kilogram times meters second squared (kg x m/s
^{2)}
Force
Newton (N)
Work
Jule (J)
Weight
Newton (N)
Time
Second (s)
Convert 60km per hour to SI units.
60km
=
1km
=
1000m
=
16.7m
1 h 1 min 1 min 1 sec
Express in scientfic notation: 17,000,000
1.7 x 10
^{7}
Express in scientfic notation: .00000089
8.9 x 10
^{-7}
Newton's first law
The Law of Inertia:
A soccer ball at rest in a field
Objects at rest stay at rest
:
Every object in a state of uniform motion tends to remain in that state of
motion unless an external force is applied to it.
Newton's Second Law
Force and acceleration
Soccer ball being kicked
Newton's Thrid Law
Action and Reaction
Kayak paddles pushing water
For every force there is an equal and opposite reaction
Velocity and Acceleration
V
: Speed together with direction of motion
A
: Rate at which velocity is charging. May be magnitude, direction or both.
Both are vectors
Law of Conservation and Momentum
In the absence of a net external force the momentum of an object or system of objects is unchanged.
(Object at rest stays at rest)
Impulse-momentum theorem
Impulse= change in momentum
Elastic collision
Two projectiles bounce off each other; apart/ seperation
Inelastic collisions
Projectiles hit and stick; same velocity after collision
Projectile motion
Can be vertical or horizontal
Circular Motion
Rotation
: Object goes around itself
Revolution
: Goes around something else