Show:
General
Lever
Inclined Plane
Pulley/Wedge
Wheel and Axle/Screw
100
This is a force that changes the motion of an object.
What is work?
100
The object being lifted is the __________.
What is load?
100
Another name for an inclined plane is a ____________.
What is ramp?
100

A simple machine that consists of a grooved wheel and a rope

What is a pulley?

100
The wheel and axle is made up of two parts: the wheel that turns on a post, which is called the __________.
What is axle?
200
You use a force to change the ________________ of an object.
What is direction?
200
The push or pull that turns a lever is the ____________.
What is force?
200
If you use an inclined plane, the distance is longer, but it takes less _______________.
What is effort?
200

This type of pulley moves with the load

What is a movable pulley?

200

This is how a wheel and axle become more efficient (less effort).

What is increasing the size (distance) of the wheel?

300

This is a tool that makes work easier to do.

What is a machine (simple machine)?

300
A lever is a board or bar that moves on a _______________.
What is fulcrum?
300
An inclined plane is a simple machine that is a flat surface that is ___________ at one end.
What is higher?
300
Two inclined planes placed back to back make this simple machine.
What is a wedge?
300

A screw is this wrapped around a cylinder.

What is an inclined plane?

400
Using a machine allows us to use ____________ force to move something.
What is less?
400

This must be done to a lever in order to decrease the amount of effort (force) needed to lift an object.

What is increase the distance or make the bar longer?

400

The inclined plane is more efficient as the length of the ramp does this. 

What is extend or get longer?

400

The simple machine wedge is different from an inclined plane because wedges simple do this.

What is separate or split objects?

400
In a wheel and axle, the wheel makes a large circular movement, and the axle makes a ____________ movement.
What is smaller?
500

Mechanical Advantage equals this when the output force (load) is 900 N and the input force is 300 N (effort).

What is a mechanical advantage of 3?

500
A lever can let you change direction of a force or it can change the amount of ______________ needed.
What is force?
500

Scientists think inclined planes may have been used to build the _______________ in Egypt because the blocks were too heavy to move straight up.

What are pyramids?

500

These are two reasons that a pulley can be useful as a simple machine.

What is change direction of the force and reducing the effort (force) needed to move an object?

500
Just like an inclined plane, a screw moves a longer distance, but less ____________ is needed.
What is effort?