Download 3rd Period SI Introduction to Force Kiosk

rd
3
Period SI
Introduction to Force
Kiosk
What is Force?
• Force is when an object has been pushed
or pulled and has been caused to interact
with another object.
• To calculate force you use the equation:
Force = mass * acceleration (F=m*a).
• Force is measured in Newtons
• Discovered mathematically by Sir Isaac
Newton.
What is Force? (cont.)
• Force is push or pull of
something
• Force has magnitude and
direction
•
By: Rohan Achar, Mackenzie
Banks, Ronnie Parker
Some examples of force are a pulley,
two magnets, and a block falling to the
ground.
The Newton
The Newton, named
after Isaac Newton,
is the SI unit of
force. It means how
much force is
provided to move
one kilogram one
meter per second
per second.
Sir Isaac Newton, the
Newton’s namesake.
How are Newtons Measured?
Newtons are
calculated as
0.224809 pounds,
commonly
rounded to 0.225
pounds. The
formula is
1N = 1 kg x 1m/s/s.
An apple falling was
part of one of
Newton’s most famous
discoveries: gravity!
balanced Force!
Because the vertical forces on this car are
balanced, it is moving neither up or down
vertically.
•Balanced
force is when
an object is
being acted
upon by two
different
forces of the
same
magnitude in
opposite
directions
•An object being acted upon by balanced
force has a net force of zero and is
considered to be in equilibrium.
•Balanced force doesn’t cause objects at rest
to start moving or moving objects to slow
down.
•Both constant speed and no motion are
examples of balanced force.
By Adam F, Debbie H, and Shashank R
Unbalanced Force
By:
Lindsey Jackson
Katie Uhl
Raghav Sharma
Unbalanced Force
• An individual force without a force of equal
strength in an opposite direction
• It causes acceleration
Friction is the force resisting
the relative motion of
two surfaces in contact or a
surface in contact with a fluid.
By: Tanya Akl,
Danielle Margheret,
& Jessica Port
Mayday, Mayday!
FRICTION PULLS THE
OPPOSITE WAY AN
OBJECT MOVES.
FRICTION MUST BE
FOUND BY
EXPERIMENTATION!
FRICTION IS NOT
FUNDAMENTAL
SOURCE!
Static Friction
-Static Friction is when the force of friction is greater than
the force that is pushing the object
-Static friction is greater that kinetic friction
-Without static friction, we wouldn’t be able to do many
things we do in our everyday life. For example a table
would move all over the place with out static friction.
By Erik Gustafson and Zach Ginis
This picture is an
example of stactic
friction. If the applied
force is even with the
force of gravity and
friction the object will
not move.
KINETIC FRICTION
-Occurs when two objects are
moving while in contact with each
other
Subtypes:
1. Sliding Friction
When solids move
against each
other.
- Book sliding on a
table (The book
eventually stops
sliding)
2. Fluid Friction
When solids move
through a fluid.
- Water spilling on the
floor (The water
stops moving
eventually)
•Use Lubricants
•Liquid
•Motor Oil
•Grease
•Solid
•Wax
•Gas
•Tiny holes on an air hockey table
•Replace sliding friction with rolling friction
•Smooth surfaces
Group 8: Alyssa and Bethany
•Increase roughness
•Create more traction
•Dry the surface
•Less slippery
•Increase weight of sliding object
•Increase amount of force pressing
the 2 objects together
**Increase the coefficient of
friction