forces and motion
If you ride a bicycle up a hill, you are using you are using (Less/More) power than if you had driven a car up the hill.
a wheel with a rope that passes over the wheel to pull objects.
Give an example
Pulley
The measure of how fast something moves over a certain distance.
What is speed?
A push or a pull
Force
A bar that moves on or around a fixed point.
Give an example
What is a lever.
The result of a force applied to an object causing the object to move
the force pulling together all objects in the universe.
Gravity
Two men are digging 10 feet deep holes. The first man uses a tractor. The second man uses a shovel.
1. Did one of the men use more power? Which Man?
2. Did one of the men do more work? Which man?
1. The first man used more power to dig his hole.
2. Both man did the same amount of work.
A slanted surface
Give an example
An Inclined Plane
The distance the truck moves divided by the time it takes.
What is the truck's speed?
The amount of work done over a certain span of time
power
the force that resists motion of one object against another
Friction
Define Work
The result of a force applied to an object that causes the object to move
Give an example
Wedge
There is no movement even though forces are at work.
What is happening when there are balanced forces at work?
A tool that requires only one force
simple machine
Define Power
The amount of work done over a certain span of time
an inclined plane wrapped around a wheel and axle machine
Give an example
A Screw
a steering wheel in a car
What is an example of a Wheel and Axle Machine
the change in an objects position
motion