Simple Machines
This simple machine uses a fulcrum.
Lever
This simple machine changes the direction of force.
Pulley
Simple machines reduce the total amount of work done.
False
What is the formula for work?
W= F*D
Mechanical advantage compares these two forces.
Output force and input force
This simple machine is used to raise a flag.
Pulley
This simple machine reduces force by increasing distance.
Inclined Plane
A screw is an inclined plane wrapped around a cylinder.
True
If you push with 10 N of force for 2 m, how much work is done?
20 J
Input force = 50 N, output force = 200 N. What is MA?
4
This simple machine is commonly used to split wood.
Wedge
This simple machine concentrates force to split materials.
Wedge
A pulley can change the direction of force.
True
If force = 5 N and distance = 4 m, what is the work?
20 J
Input force = 100 N, output force = 500 N. What is MA?
5
This simple machine is a ramp.
Inclined Plane
This simple machine multiplies force using a fulcrum.
Lever
Mechanical advantage compares input force to output force.
True
If force = 20 N and distance = 3 m, what is the work?
60 J
If a machine has MA of 1, what does that mean?
Input force equals output force
This simple machine is found in a doorknob.
Wheel and Axle
This simple machine turns rotational force into pushing force.
Screw
All pulleys increase force.
False
If work = 100 J and distance = 5 m, what was the force?
20 N
If input force = 25 N and output force = 100 N, what is MA?
4