Words and Phrases
This is defined as a push or a pull that causes an object to move.
A force
I have a fulcrum and an arm, and I can be used to lift heavy loads without too much effort.
lever
In a lever, the job of lifting a load gets easier as the fulcrum moves ______________ (closer to or further from) the load?
closer to the load
A flag pole has this simple machine on it to help lift a flag to the top.
A pulley
If you wanted to lift a heavy load up, what simple machine could you use? (There are three that we studied that could do the job, choose one)
Pulley, lever or an inclined plane
This is the force that causes objects to fall to the earth.
Gravity
I am a ramp that makes it easier to move objects up.
Inclined Planes
In a pulley system, the job of lifting a load gets easier when ________________ (more or less) pulleys are added to the system.
more pulleys are added
A Ferris wheel is an example of this simple machine.
Wheel and axle
A doorstop is an example of what kind of simple machine?
A wedge
The resistance that makes it hard to move an object across a surface.
friction
I am a two part system with a disk and a rod, and I can make it easier to move heavy loads.
Wheel and Axle
As the angle of the incline plane increases, the effort needed to move a load ___________ (increases or decreases)?
increase
A hiking trail with lots of switchbacks is an example of this type of simple machine.
An inclined plane
If you wanted to make it easier to lift something using a lever, would you want the lever arm to be longer or shorter?
longer
The energy required by a person to move an object
effort
Wedge
A wedge ___________ (changes the direction of a force or magnifies a force).
changes the direction of a force
A butter knife is an example of this simple machine.
A wedge
These two simple machines both use an inclined plane. (Name two machines that we studied independently)
Wedges and Screws
A force acting on an object to move it a certain distance.
Work
I make it easier to lift heavy loads by changing the direction of a force or reducing the effort required. I have a grooved wheel and rope.
Pulleys
If a surface has a lot of friction that it is __________ (easy or hard) to move an object across it?
hard
I can change a rotational force to a forward movement.
screw
Why is it easier to ski down a snowy hill that down a grassy hill?
snow has less friction.