Simple Machines
Which lever?
Parts of a lever
Compound Machines
Work
100
A wheel with a groove along its edge and a rope or chain around it is
What is pulley?
100
Which class of lever does a pair of scissors belong to?
What is 1st class?
100
What is the fixed pivot point of the lever called?
What is the fulcrum?
100
What is the definition of a compound machine?
What is a machine made up of two or more simple machines.
100
What is the unit used to measure work?
What is the joule?
200
A simple machine with an arm that moves about a fixed point or fulcrum?
What is lever?
200
Which type of lever does a teeter-totter belong to?
What is first class?
200
The _________ is the part of the lever where force is applied.
What is effort arm?
200
Which of the following is an example of a compound machine? rake, screwdriver, axe, or paper cutter?
What is paper cutter?
200
What is the scientific definition of work?
What is using force to cause a motion?
300
A simple machine with a central point around which a wheel moves?
What is wheel and axle?
300
Which type of lever does a wheelbarrow belong to?
What is 2nd class lever?
300
The __________ is the part of the lever that applies a force on the object.
What is resistance arm?
300
What two simple machines is a pair of scissors made of?
What is wedge and lever?
300
Do simple machines reduce work?
What is NO, they just make it easier to do.
400
A simple machine made out of one or more inclined planes. It can raise or split apart objects.
What is wedge?
400
Which type of lever does a fly swatter belong to?
What is third class lever?
400
Which type of lever has the load, or resistance arm, in the middle?
What is second class lever?
400
What two simple machines is a butter knife made of?
What is wedge and lever?
400
The greater the _______ of a machine, the less work the machine wastes.
What is efficiency?
500
An inclined plane wrapped around a cone or a cylinder. Which type of simple machine?
What is screw?
500
Which lever can change the direction of a force without changing the amount of force or the distance?
What is first-class lever?
500
Which type of lever has the effort arm in the middle?
What is third class lever?
500
What simple machines is a bicycle made of?
What is wheel and axle, lever, and screw?
500
If a machine produces 30 joules of work when 30 joules of work are put into it, it has an efficiency of _____. (What percent?)
What is 100%?
M
e
n
u