Simple Machines Flashcards
(30 cards)
What are the six simple machines?
- Wedge
- Inclined Plane
- Lever
- Pulley
- Screw
- Axle
What is a lever?
A lever consists of a bar that pivots on a fulcrum.
What happens when force is applied on a lever by pushing down?
It results in a force pushing up at the other end.
What is located in the center of a 1st Class Lever?
Fulcrum
What is located in the center of a 2nd Class Lever?
Load
What is located in the center of a 3rd Class Lever?
Effort
Give an example of a 1st Class Lever.
Seesaw
Give an example of a 2nd Class Lever.
Wheelbarrow
Give an example of a 3rd Class Lever.
Baseball bat
What does a wheel and axle do?
Makes work easier by moving part of the machine faster.
What is a pulley?
Uses a wheel and rope to change the direction and/or force of an object.
What is an inclined plane?
A flat surface raised at an angle.
How does the steepness of a ramp affect work?
The less steep the ramp is, the less force required.
What is a wedge?
Made up of two inclined planes put together.
How does the thickness of a wedge affect work?
The thinner the wedge is, the easier the work is.
What is a screw?
Works like an inclined plane wrapped around a cylinder.
How does the distance between threads on a screw affect work?
The less distance between threads will make the work easier.
How do simple machines help make work easier?
They decrease the effort and force needed for certain things and make certain things faster.
What is a lever?
A bar that pivots on a fixed support.
Example: Seesaw
What is an inclined plane?
A flat surface raised at an angle.
Example: Ramp
What is a pulley?
A wheel over which a rope is pulled.
Example: Flagpole
What is a wedge?
A device used to push or cut.
Example: Axe
What is a screw?
An inclined plane wrapped around a cylinder.
Example: Jar lid
What is a wheel and axle?
Two parts that rotate together in the same direction.
