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WorksheetsMechanical Advantage Study Guide
Total questions: 30
Worksheet time: 36mins
What is the formula for mechanical advantage?
MA=force x distance
MA = distance ÷ time
MA = time ÷ distance
MA = output force ÷ input force
What is the formula for work?
work=force x distance
work = distance ÷ time
work = time ÷ distance
work = output force ÷ input force
What is mechanical advantage?
The advantage a machine has over a bicycle
A measure of how much a simple machine reduces work
A measure of when is the best time to use a simple machine
the number of times a machine increases input force
A machine is a device that can multiply
work
joules
force
all of the above
Mona has locked herself out of her house. She
wants to use a crow bar to open the door. The
effort length of the crowbar is 48 cm and
mechanical advantage of the crowbar is 6. What
is the resistance length of the crowbar?
6 cm
8 cm
10 cm
12 cm
What is the mechanical advantage of a lever that has an input arm length of 10 m and an output arm length of 2m?
5
2
8
10
The inclined plane shown below is being used to lift a box 6.0 feet.The inclined plane has a mechanical advantage of 1.5. What is the length, x, of the inclined plane?
.25ft
6ft
7.5ft
9ft
Jolie is on the weightlifting team at her school.
She must lift as much weight as possible from the
ground to a straight up standing position. How
much work will Jolie do if she uses a force of 5 N
to lift 150 pounds of weight to a height of 1.5 m?
3.3 J
3.5 J
6.5 J
7.5 J
Andrea is building a birdhouse. She hammers a nail in the wrong place and needs to remove it. She uses the back of her claw hammer to hold the nail and pushes the handle to remove the nail, as shown in the diagram. Andrea is using the hammer as a simple machine to pry the nail out. What is the mechanical advantage of the hammer?
0.2
0.4
2.5
5.4
If a large force is exerted on an object, when is no work performed?
when the object moves
when the object does not move
when the power is too large
when there is no friction
What is the unit of measurement for work?
Newtons
Joules
Watts
Metres
Charlie lifts a box with a force of 500 N and sets it
on a table top 1.2 m above its starting position.
Lauren pushes an identical box up a 5 m ramp
from the floor to the top of the same table. Which
person did more work?
Charlie did more work.
Lauren did more work.
Both Charlie and Lauren did the same amount
of work.
The size of each individual must be known to
determine who did more work.
Jermaine used 12 newtons of force to push a box 4 meters down the driveway. How much work, measured in joules (J), did he do to move the box?
3 J
8 J
16 J
48 J
the amount of work you do when you exert one Newton of force to move the object one meter
joule
newton
meter
output force
Taylor says he likes using simple machines because they do his work for him. Alicia says that simple machines only help do the work, but do not do the work for you. Which best describes who is correct?
Alicia is correct because simple machines use electricity to help perform jobs.
Taylor is correct because simple machines are always used without anyone touching them.
Taylor is correct because simple machines are always used in factories and don't require work.
Alicia is correct because simple machines change the amount of work required, but still require work.
What is effort (input) force?
the force one exerts on a machine
the force which an effort force must overcome in order to do work on an object via a simple machine.
the force the machine exerts on a object
the output work times the input distance
Which is the best way to increase the mechanical advantage of an inclined plane?
by increasing the length of the inclined plane
by decreasing the length of the inclined plane
by increasing the output force of the inclined
plan
by decreasing the output force of the inclined
plane
the percentage of the input work that is converted to output work
mechanical advantage
efficiency
joule
machine
Which of the following is a compound machine?
a wheel and axle
a pulley
a pair of pliers
a ramp
Which of the lever would it take less force to lift?
Lever A
Lever B
What is resistance (output) force?
the force required by a machine in order to accomplish work (the force you put on the machine)
The force that is exerted by a machine
the force the machine exerts on a object
the output work times the input distance
A box of weight W is lifted by a force F using a lever as shown below.
What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?
0.5
2
3
6
What type of simple machine would you find on the bottom of a car?
Inclined Plane
Pulley
Wheel and Axle
Wedge
Which of these is an example of a wedge?
Knife
Stairs
Skateboard
Broom
