Force
an object that changes a force
simple machine
The application of a force to an object to move it a certain distance in the direction of the force.
Work
Made up of a bar that pivots at a fixed point
Lever
When an object is in motion, this is changing
position
What is the three law of motion
Law of Inertia, the law of acceleration, the law of action and reaction
a force that pulls object's toward each other
gravity
An amount that an object travels
Distance
a force that slows or stops motion between two surfaces
friction
distance and time are two measurements needed in order to solve for this
speed
3 types of forces
Gravitational, applied, and frictional force
A push or pull action upon an object as a result of its interaction with another object.
Force
Straight slanted surface
Inclined plane
Why are simple machines useful?
they make work easier to do
A simple machine that consists of two circular objects of different sizes
Wheel and axle
Six basic types of simple machines
Inclined plane, wedge, screw, lever, pulleys, wheel and axle
the force which the earth, moon, or other massively large object attracts another object towards itself.
Gravitational force
An inclined plane that is wider or thicker at one end than at the other
Wedge
Name two ways a simple machine can change a force
-by changing the direction of the force
or
-by increasing the distance over which you have to apply a force
2 examples of wedge
Knife blade and axe
describe a situation where less friction would be useful
snowboarding, ice skating, airplane design
pushes or pulls that cause objects to change their motion
force
An inclined plane that is wrapped around a cylinder
Screw
A rope or chain wrapped around a wheel
Pulleys
two examples of screw
screw and battle cap
explain how force affects speed and motion
if you push an object with force, you increase it's speed and motion. if you pull an object with force, you can slow or stop it's speed and motion.