Simple Machines
This is the pivot point of a lever.
What is the fulcrum?
A push or pull that can change an object’s motion or shape.
What is a force?
This happens when a machine turns a small input force into a larger output force.
What is mechanical advantage?
This is the scientific term for the ability to do work.
What is energy?
This simple machine helps lift heavy objects using a tilted surface.
What is an inclined plane?
These are the six basic simple machines.
What are the lever, inclined plane, wheel and axle, pulley, screw, and wedge?
These are the two components every force has.
What are magnitude and direction?
This formula calculates actual mechanical advantage.
What is output force divided by input force?
The unit used to measure work and energy.
What is a joule?
This is the force that resists motion between surfaces.
What is friction?
This type of lever has the load between the fulcrum and the effort force.
What is a Class 2 lever?
This type of friction keeps an object from moving at rest.
What is static friction?
A machine with an input force of 20 N and output force of 100 N has this AMA.
What is 5?
The formula used to calculate work.
What is work equals force times distance?
This is the difference between mass and weight.
What is mass being the amount of matter and weight being the force of gravity acting on that mass?
This simple machine is actually an inclined plane wrapped around a central core.
What is a screw?
Earth exerts this much gravitational force per kilogram.
What is 9.8 N/kg?
Lubrication improves this by reducing friction.
What is actual mechanical advantage?
A student pushes with 50 N for 10 m. This is the work done.
What is 500 joules?
In a jar lid, pushing farther from the centre makes opening easier because of this principle.
What is greater turning force (mechanical advantage from a wheel and axle)?
A hockey stick is an example of this type of lever, which sacrifices force for speed and distance.
What is a Class 3 lever?
If two teams pull equally hard in opposite directions, this is the net force.
What is 0 newtons?
A lever with an effort arm of 3 m and a load arm of 0.5 m has this ideal mechanical advantage.
What is 6?
A student carries a backpack across a room at the same height. This amount of scientific work is done.
What is zero joules?
A machine has an ideal mechanical advantage of 8 but an actual mechanical advantage of 5. Why?
What is because some force is lost to friction, slippage, or distortion?