Vocabulary
A device that takes one force and changes its direction, distance, or strength.
What is a simple machine?
The pivot point around which a lever rotates.
What is the fulcrum?
What is a second-class lever?
What part of a wheel-and-axle acts like the fulcrum of a lever?
What is the axle?
True or False: Simple machines can increase the work that is done.
The force that is applied to a machine.
What is effort?
Two examples of first-class levers.
What is a seesaw, crowbar, scissors, screwdriver opening a paint can, pliers pulling a nail out of a board?
A scissors is this type of lever.
What is a first-class lever?
What type of pulley redirects effort but does not move as the load is lifted?
What is a fixed pulley?
What is distance or strength/force?
The object that is moved by the output force of a machine.
What is the load?
This type of lever is the only kinds that has the effort arm and resistance arm on opposite sides of the lever.
What is a first-class lever?
A fishing pole is an example of this type of lever.
What is a third-class lever?
Which type of simple machine is a winding road going up a steep hill or mountain?
What is an inclined plane?
True or False: A simple machine can decrease the amount of time that it takes to get work done.
What is TRUE?
A device that is formed by combining two or more simple machines.
What is a compound machine?
A third-class lever increases this instead of increasing the strength of a force.
What is distance?
A bottle opener and a nutcracker are both examples of this type of lever.
What is a second-class lever?
Which simple machine is an incline plane wrapped around a cylinder?
What is a screw?
The ratio of the lengths of the effort arm and the resistance arm which increases the strength of the output.
What is mechanical advantage?
The ratio of input energy to output work, usually written as a percentage to show how much work a machine does for the given input of energy.
What is efficiency?
In a second-class lever, which arm is longer, the effort arm or the resistance arm?
What is the effort arm?
A baseball bat and a long-handled broom are both examples of this type of lever.
What is a third-class lever?
Which simple machine is an incline plane that is pushed into an object in order to split the two halves of the load?
What is a wedge?
You can find this by multiplying the effort by the mechanical advantage of a machine.
What is strength of the output?