Simple machines make __________ easier to do.
Work
In science, work refers to the use of __________ to move a load (object) through a distance. (hint- Work=____ x distance)
Light
Force
Energy
Heat
In a simple machine, the word “__________” refers to the force that is applied to one part of the machine in order to do work.
Component
Wheel
Fulcrum
Effort
Simple Machines make work easier by spreading the effort needed over a longer distance, thereby requiring less __________ .
Time
Gears
Mechanical parts
Force
The mathematical calculation that tells how much easier a simple machine has made work is called ___________ advantage.
mathematical
mechanical
scientific
In a wheel and axle simple machine, like the Knex well that we made in class, the handle that we turned to raise the bucket was the ________ and the pole that the string was wrapped around was the ________.
wheel, axle
axle, wheel
In the wheel and axle simple machine, like the well, the larger the wheel you crank, the more distance it is for each turn of the handle, but the _____________ it will be to turn the wheel.
easier
harder
With an inclined plane, moving a load up a ramp is easier than lifting it straight up because the effort needed is less. However, the _____________ it is moved is longer.
height
distance
effort
Using the K-nex ramp in class, we discovered that moving the object up the steeper ramp required more ___________ of force than moving the same object up a longer, less steep ramp.
Newtons
Joules
Meters
Amps
For a lever, we made a K’nex balance, which acted as a simple lever, another simple machine. By moving the load (which was a paper clip with washers on it) closer to the fulcrum, we needed _________ effort (weight) to balance it.
less
more
the same amount of
For gears, we made a K’nex crank fan. There were 2 gears: the driver gear (which was connected to the hand crank) and the driven gear (which was connected to the fan.) Which set-up with the gears made the fan go the fastest?
Driver gear: medium; Driven gear: medium
Driver gear: big; Driven gear: small
Driver gear: small; Driven gear: big
In a sailboat there is a compound pulley to raise a sail (like a flag on a flagpole.) Using the K'nex pulley, we pulled the string a _____________ distance than the “sail” was raised, making it ___________ to raise the sail.
Longer, harder
Longer, easier
Shorter, easier
Shorter, harder
Which simple machine is represented by a see-saw?
Pulley
Lever
Gears
Inclined plane
Which simple machine is represented by a ramp?
Inclined plane
Lever
Pulley
Wheel and axle
Which simple machine is represented by a bicycle?
gears
pulley
wheel and axle
lever
Which simple machine is represented by a hammer?
Wheel and axle
Pulley
Inclined plane
Lever
