100 200 300 400 500 by any name work it out little help here forcing the issue k.i.s.s. strong arm...
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100 100 100 100 100 100
200 200 200 200 200 200
300 300 300 300 300 300
400 400 400 400 400 400
500 500 500 500 500 500
By Any Name
Work It Out Little Help Here
Forcing the Issue K.I.S.S.
Strong Arm Tactics
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What must happen in order for a person to do work?
A 100
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1)A force must be applied to the object
2)The object must move
3)The object must move in the direction of the force
A 100
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Which of the following is an example of work: reading this question, thinking about the answer, pushing the egg, or
speaking the answer?
A 200
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Pushing the Egg
A 200
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Why is carrying a bag of groceries into the
house not considered work?
A 300
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Because the direction of the force you apply to the bag is not the same as the direction
the bag is moving
A 300
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What is the formula for work?
A 400
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Work = force x distance
A 400
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1)A student spins the dial on her locker, then
2)pulls up on the latch to open the locker.
3)the student pulls out her science book, and
4)places it on the ground.
In which step(s) above does the student do work? Explain your
answer. A 500
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The student does work when spinning the dial, pulling up on the latch, and picking up the book, because the student
applied a force which caused the object to move in the
direction of the force.
A 500
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How much work was done in the above sitation?
B 100
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5 N x .1 m = .5 Joules
B 100
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How much work was done in the above situation? Explain
your answer.
B 200
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Since none of the students are moving, there is no work
being done in the classroom
B 200
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Mechanical Advantage compares which two
things?
B 300
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Mechanical Advantage compares the input force
applied to the machine and the output force applied by
the machine.
B 300
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What is the mechanical advantage of a machine that multiplies the input force: <1,
=1, or >1?
B 400
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The mechanical advantage of a machine that multiplies
the input force is greater than 1 (>1)
B 400
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Name two simple machines that would multiply the input force.
B 500
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Inclined planes, wedges, screws, 2nd class levers,
some wheel and axles, and pulley systems all multiply
the input force
B 500
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Any device that makes work easier or more efficient is
called what?
C 100
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A machine
C 100
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Name two of the three ways machines can make work easier or more efficient.
C 200
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1)The machine can multiply input force.
2)The machine can multiply input distance.
3)The machine can change the direction of the input force.
C 200
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How does using a machine affect the amount of work a
person needs to do?
C 300
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It does not change the amount of work the person
needs to do. Using a machine does not affect
the amount of work done.
C 300
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DAILY DOUBLE
C 400
DAILY DOUBLEPlace A Wager
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What is the ideal efficiency of a machine?
C 400
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Ideal mechanical efficiency is 100 %.
C 400
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What happens to efficiency when friction increases?
C 500
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As friction increases, efficiency decreases.
C 500
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Which pair of objects would be more strongly attracted due to gravity? Explain your answer.
D 100
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Because the objects in pair A appear to have more mass, they will have a stronger attraction die
to gravity, according to the universal law of gravitation.
D 100
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What could you do to the objects in pair B so they have the same
gravitational pull as the objects in pair A?
D 200
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The objects in pair B should be moved closer together, which
would increase their gravitational pull.
D 200
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If they were dropped at the same time, which would fall
the fastest: a piano, a bowling ball, or a person?
D 300
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All three objects would fall at the same rate, since their attraction to Earth is the
same.
D 300
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D 400
What could you do to increase the amount of friction in a
situation?
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D 400
Make surfaces rougher, increase speed, increase
pressure, remove wheels, etc.
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D 500
Why does a person skydiving fall slower once
they open their parachute?
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D 500
Opening the parachute increases the air resistance (friction) of the person, and the increased friction is able to balance gravity at a lower
speed.
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Which simple machine does the above best
represent?
E 100
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A slide is an example of an inclined plane.
E 100
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What is the axle in the above machine?
E 200
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The handle in the middle is the axle.
E 200
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E 300
What simple machine is best represented by the
diagram above?
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E 300
The base of the light bulb is an example of a
screw
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E 400
What are wedges typically used for?
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E 400
Separating objects or holding objects
together
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An inclined plane allows you to apply less force to lift an object. What is the
disadvantage of an inclined plane?
E 500
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You must apply the force over a greater
distance.
E 500
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Which of the levers above are 1st class levers?
F 100
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The see-saw, hammer, and the scissors are all
1st class levers?
F 100
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F 200
Which of the levers above are 2nd class levers?
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The nutcracker and wheelbarrow are 2nd
class levers
F 200
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F 300
Which of the levers above are 3rd class levers?
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The shovel and ping pong paddle are 3rd
class levers
F 300
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F 400
Give three examples of 2nd class levers from this
classroom.
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The doorknobs, the front and back doors, the cabinet
doors, the front of a binder, the 3 hole punch, etc.
F 400
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F 500
When you use a spoon to eat, which class of lever is it? What
is the fulcrum?
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When using a spoon to eat, you are using a 3rd class lever. The fulcrum of the lever is your wrist (or elbow).
F 500
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The Final Jeopardy Category is:
Compound Machines
Please record your wager.
Click on screen to begin
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Name one example of each simple machines, and two classes of levers, from the
situation above.
Click on screen to continue
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Inclined Plane – the hillWedge – the helmets
Screw – screws on the bike1st class lever – bike handlebars3rd class lever – bikers’ arms and
legsWheel and Axle – back tire of bike,
bike pedalPulley – bike chain
Click on screen to continue
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Thank You for Playing Jeopardy!
Game Designed By C. Harr-MAIT