Vocab
When a force makes an object move...
What is work?
a slanting surface with one end higher than the other
What is an Inclined Plane?
a rigid bar or rod that turns around a fixed point
What is a lever?
Force is reduced, but You have to use more rope.
List two types of simple machines in a pair of scissors.
Wedge, Lever,
Which type of pulley has NO IMPACT on force or effort?
A fixed pulley.
The name for the thing that is lifted or moved by a simple machine.
What is a load?
a type of inclined plane with one or two sloping surfaces
What is a wedge?
a large wheel fixed to a long rod.
What is a wheel and Axle?
What is the "Price" of using a wheel and axle?
The wheel must be larger to reduce force-it means you have to twist it more to get the same result.
When a wedge is hit, the downward force is pushed into another direction…What is it?
Outward or Sideways.
What is the "Price" of using a screw...
More threads are needed to make...1. Twisting easier and 2. You need do more twisting for the work to happen.
a push or pull on an object
What is force (or effort)
an inclined plane wrapped around a rod
What is a screw?
a wheel with a groove in for a rope or cable
What is a Pulley?
Which type of pulley is responsible for reducing force and making work easier?
What is a movable pulley?
A screw is made up of two simple machines...Which are they?
A wedge and incline plane.
I am made up of several simple machines...What am I?
A compound machine?
A type of pulley that is bolted to a wall or ceiling.
What is a fixed pulley?
A type of pulley that is usually connected to the load. It does not stay in one place.
What is a movable pulley?
What is the "Price" for using a lever?
Force goes down, but the lever has to be longer (Empire state building and notebook)
There are three types of force that we use to move objects…What are they?
Push, Pull, Rotational (twisting)
The thing that makes a lever move.
What is a fulcrum?
A screw uses two types of force, what are they?
Rotational (the twisting at the top of the screw)
Linear (when the screw goes up or down)
What is the "Price" of an inclined plane.
Force is reduced, but the inclined plane has to be longer for it to happen.
Where would you put the fulcrum to get maximum mechanical advantage?
As close to the person giving the force to lift the load.
What is the payoff?
Work is made easier, but the payoff is that the distance is longer.
Give an example of a compound machine. Name the simple machines used in each one.
Fishing Rod. Wheel and axle for the fishing line. Lever-It has a fulcrum (our hand) and a rod that moves.