WorksheetsSimple Machines Review
Total questions: 42
Worksheet time: 35mins
How does a simple machine make work feel easier?
reducing work
reducing input force
increasing work
increasing output force
Which is an example of work?
holding a book
pushing a brick wall
rearranging desks
What type of machine changes the direction of the force but not the amount of force?
single pulley
incline plane
multiple pulleys
lever
Where should the effort be on a lever to reduce the amount of the effort force?
beside the fulcrum
far from the fulcrum
in the middle
beside the load
Work is...
energy from the sun.
not important in life.
a force applied to an object to move the object a distance.
something that pulls you toward the Earth.
A wheelbarrow is an example of a
First-Class Lever.
Second-Class Lever.
Third-Class Lever.
Fourth-Class Lever.
In third-class levers, the ______ is in the middle.
effort
fulcrum
load
Which of these is not part of the lever?
Object
Fulcrum
Load
Effort
The force placed on the simple machine to move the load is called the ____.
effort
fulcrum
load
lever
Which is an example of a wheel and axle?
using a stapler
cutting food with a knife
turning a door knob
hitting a pitched softball
How is this hammer an example of a simple machine?
It is being used as a wheel and axle to rotate the nail out of the wood.
It is being used as a wedge to split the wood into two pieces.
It is being used as a pulley to pull the nail out of the wood.
It is being used as a lever to pry the nail out of the wood.
What is a simple machine?
a machine that decreases the amount of work
a machine that makes work harder to do
a machine that reduces the input force needed
a machine that reduces the output force
This man is trying to move the rock but is having trouble. Which option is the BEST solution?
pick up the rock, by using his arms as a lever, and put it into a wheelbarrow to move it
get a longer stick
put a smaller rock under the stick, as a fulcrum, and then push down on the stick
Snowblowers, ice augers, and the top of a bottle cap are all examples of which simple machine?
wheel and axle
levers
screws
pulleys
Nails, doorstops, hammers, and knife blades are examples of which simple machine?
wheel and axles
screws
levers
wedges
Skateboards, rolling pins, and doorknobs are all examples of which simple machine?
wheel and axle
screw
levers
pulley
Paddles, rakes, staplers, brooms, and fishing rods are all examples of which simple machine?
wheel and axle
lever
wedge
inclined plane
A clothesline, crane, ski lift, and flagpole are all examples of which simple machine?
pulleys
wedges
levers
screws
This class of lever has the fulcrum in the middle.
1st
2nd
3rd
This class of lever has the effort in the middle.
1st
2nd
3rd
This class of lever has the load in the middle.
1st
2nd
3rd
What is mechanical advantage?
The helpfulness or usefulness of a simple machine
The profit a simple machine can make
A value calculated by A = lw
When can a machine produce more work than is put into it?
Always
Only when the right force is applied.
Never
Are combinations of pulleys potentially more effective than single pulleys?
yes
no
The W in the formula for mechanical work (W = Fd) stands for weight.
True
False
The F in the formula for mechanical work (W = Fd) stands for force.
True
False
What is the formula for calculating work?
Work = Force X Distance
Work = Force + Distance
Which is an example of work?
trying to push a car that doesn't move out of deep snow
pushing a child on a swing
How much work is done if an object is moved 10m using a force of 30N?
300 J
300 m
40 J
What should they do to make it easier for the mouse to pick up the elephant?
The elephant should move closer to the middle.
The mouse should move closer to the middle.
Which inclined plane would require the most force to push the box up into the truck?
A
B
