WorksheetsWork & Mechanical Advantage
Total questions: 21
Worksheet time: 21mins
Which 3 parts make up "Work"?
A force must be applied to the object
The object must move
The object must move in the same direction as the force
The object must move in the opposite direction as the force
When you know the (a) , the formula is INPUT ÷ OUTPUT. When you know the (b) , the formula is OUTPUT ÷ INPUT.
Which TWO of these are considered examples of "Work"?
Pushing a box
Walking with a backpack
Lifting a bag of groceries
Carrying a bag of groceries
Mathematically...we say: Work equals
Force x Mass
Force x Distance
Mass x Acceleration
Distance ÷ Time
The unit "Newton-Meter" or "N ⋅ m" is also known as...
Mass (m)
Force (F)
Joules (J)
Work (W)
If it took a bulldozer 567.6 joules of work to push a mound of dirt 30.5 meters, how much force did the bulldozer have to apply?
18.6 N
0.05 N
18.6 J
17, 311.8 N
You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7 J of work in the process, how far have you moved the book?
0.6 J
12.15 m
0.6 m
1.67 m
How much work is done on a 75 N bowling ball when you carry it horizontally across a 10 m wide room?
750 N
1.34 J
7.5 J
750 J
True or False?
A simple machine does not help you do less work.
True
False
The output can also be known as which two?
Load
Resistance
Applied Force
Effort
Organize these options into the right categories for levers:
seesaw
pry-bar
wheelbarrow
stapler
broom
baseball bat
Using the "FLE" 123 pneumonic device we've learned in class, match the image to the correct category. (Hint: the "Load" is also known as the "Resistance" or "Output")
1st Class Lever
2nd Class Lever
3rd Class Lever
A lever is used to lift a heavy box with an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?
5
0.2
3.2
6
A force of 50 N is applied to the end of a lever to lift a rock that is 350 N. What is the MA of the lever?
70
0.14
7
17,500
How do you calculate the Mechanical Advantage of an Inclined Plane? (Hint: think of a RAMP!)
Length of the plane divided by the height (L ÷ H)
Force times distance (F x D)
Output divided by Input
(O ÷ I)
Finding the Mechanical Advantage of a Wedge is similar to an Inclined Plane. (Length ÷ Height)
False
True
A knife has a slope of 3 centimeters and the width is 1.5 centimeters, what is the mechanical advantage of this wedge?
2
0.5
3
4.5
Organize these options into the right categories.
The pulley is such that an input force of 223 N is needed to provide an output force of 1784 N.
A rake is held so that its input arm is 0.4 meters and its output arm is 1.0 meters.
the effort length for a claw hammer is 11.0 cm and the resistance length is 2.0 cm.
A force of 50 N is applied to the end of a lever to lift a rock that is 350 N.
A knife has a slope of 3 centimeters and the width is 1.5 centimeters.
A kid pulls on a rope with 20 N of force. The block and tackle system pulls up a 160 N box
What are TWO ways that we can find the Mechanical Advantage of a Pulley system?
Count the number of supporting ropes, minus the one you are pulling on
Count the number of supporting ropes in total
Count the number of wheels involved
Count the number of wheels, minus one
A pulley is used to raise a heavy crate. The pulley is such that an input force of 223 N is needed to provide an output force of 1784 N. What is the mechanical advantage of this pulley?
8
0.125
397,832
1561
Match the following terms to the correct Simple Machines
Pulley
Wedge
Wheel & Axle
Lever
Inclined Plane
