Simple Machines Flashcards
What is the formula for Work?
Work = Force x Distance
Name the 6 types of simple machines
Wedge, inclined plane, screw, pulley, lever, wheel and axle
If you have kg in your equation, what do you do?
Multiply the number of kg’s by 9.8
Wheel and Axle
Two wheels of different sizes that rotate together
Inclined Plane
A sloping surface used to raise objects
Lever
A bar that is free to pivot at a fixed point
Wedge
An inclined plane with two sloping sides
Pulley
A grooved wheel of different sizes that rotate together
Screw
An inclined plane wrapped in a spiral around cylindrical post
What is the wheel and what is the axle?
The wheel is always the larger number and the axle is always the smaller number
To find the ma of a wheel and axle?
divide the radius of the wheel by the radius of the axle
How do you determine the ma of an object?
Ma= effort/resistance
How do simple machines make work easier?
They change the size and or direction of the force
When does work occur?
When a force causes an object to move in the direction of the force
Input/effort
The work you do do on a machine
Output/resistance
The work done by the machine
Calculating the ma of a lever
Ma= distance from fulcrum to input/distance from fulcrum to output
1st class lever
The fulcrum is in between the input and output force
2nd class lever
The load is in between the fulcrum and the input force
3rd class lever
The input is in between the fulcrum and the load
The equation for finding the ma of an inclined plane
Ma= length of incline/height of incline
