Simple Machines Flashcards
What is a second class lever
When the fulcrum is closer to the load force than the effort force
What is a third class lever
When the fulcrum is closer to the effort force than the load force
What is a first class lever
When the fulcrum is between the load force and the effort force
3 examples of simple machines with a mechanical advantage of >1
Hammer. Screw driver. Ramp
3 examples of simple machines with a mechanical advantage of
Hockey stick. Baseball bat. Garden rake
A simple machine with a mechanical advantage of 1
Fixed pulley
What are The 6 simple machines
Lever. Wedge. Inclined plane. Pulley. Wheel and axle. Screw
What is a lever
A rigid bad supported that is supported at one point
What are the 3 classes of levers
1st class. 2nd class. 3rd class
What is always the mechanical advantage of a 3rd class lever
How to find the IMA of a lever
Length of the input arm/length of the output arm
What is a pulley
A grooved wheel with a rope or cable looped around it
What is the IMA of a fixed pulley
1
What is the IMA of a moveable pulley
2
What is the IMA of a pulley equal to?
The number of support ropes
What is a wheel and axle
It is made of a shaft (axle) that is attached to a larger disc (wheel)
When is the IMA of a wheel and axle greater than 1
When an input force acts on the wheel and then output force is provided by the axle
When the input force is applied to the wheel, how do u get the IMA
Divide the radius of the wheel by the radius of the axle