this is 100 200 300 400 500 work efficient machines machines simple solutions levers crct review
TRANSCRIPT
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THIS
IS
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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
Work Efficient Machines
Machines Simple Solutions
LeversCRCT
Review
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What must occur every time for work to be exerted?
A 100
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1. A force must be applied
2. An object must move in the same direction as the force
A 100
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•What unit is used to measure force?
•What unit is used to measure work?
A 200
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•Newtons (N)
•Joules (J)
A 200
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What is the formula for work?
A 300
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Work = force x distance
(W = f x d)
A 300
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If you lift your science book up off the floor, are you doing
work?
Why/why not?
A 400
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Yes, because you are lifting your books upward, and the books are moving upward
also.
A 400
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A 500
You pick your cell phone up off the counter and talk into it as you walk across the room. When you finish talking, you place it back on the
counter and slide it away from the edge.
When are you doing work on the cell phone?
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1. Picking up the cell phone
2. Placing it down on the counter
3. Pushing it away from the edge
A 500
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You exert 20 N to push a desk 10 m.
B 100
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200 J
B 100
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You move a wheelbarrow
50 m by exerting 100 N.
B 200
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5,000 J
B 200
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What is the MA of a machine that has an output of 250 J if
you have an input of 10 J.
B 300
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25
B 300
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You push a car 0 m with 200 N
B 400
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B 400
No work is being done because the car didn’t move
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You carry your cat 50 m with 100 N
B 500
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No work is being done, you are holding the cat up and moving it
forward
B 500
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What is a term that means the same thing as input force?
C 100
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Effort
C 100
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OL-What is the ideal mechanical efficiency of a
machine?
AD- How do you calculate the mechanical efficiency of a
machine?
C 200
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OL- 100%
AD- output force
input force
C 200
x 100%
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How do you find the MA of a machine?
C 300
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Output force
Input force
C 300
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C 400
What are the 3 ways a machine can help you do work?
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1. Multiply distance
2. Multiply force
3. Change direction
C 400
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C 500
What is the MA of a machine that multiplies force?
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Greater than 1
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An inclined plane that moves is called?
D 100
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A wedge
D 100
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An inclined plane wrapped around a cylinder is called?
D 200
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A screw
D 200
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A machine that uses 2 or more simple machines is
called?
D 300
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A compound (or complex) machine
D 300
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Which type of simple machines best represent
these parts of your body?
1. Muscles and bones
2. Teeth
D 400
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1. Levers
2. Wedges
D 400
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Why would you increase the length and thinness of a
wedge?
D 500
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To create a greater MA
D 500
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The fixed point a lever pivots around is called?
E 100
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The fulcrum
E 100
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The weight the lever lifts is called?
E 200
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The resistance
E 200
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What is always located in the middle of a 2nd class levers?
E 300
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The resistance
E 300
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What class of lever does a bottle opener belong to?
E 400
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2nd class
E 400
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What class of lever do pliers belong to?
E 500
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1st class
E 500
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From an element’s location on the periodic table, what
can you predict?
F 100
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An element’s properties
F 100
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What is used to measure how much matter an object
contains?
F 200
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Mass
F 200
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When elements are in the same column on the periodic table,
they are in the same _________.
F 300
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Family
F 300
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How are atoms and elements related?
F 400
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Every element has it’s own specific type of atom.
F 400
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In order for a skater to not be accelerating, what would they
need to be doing?
F 500
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Skating in a straight line at a constant speed.
F 500
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The Final Jeopardy Category is:
Types of Machines
Please record your wager.
Click on screen to begin
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OL- Explain why wedges and screws are actually types of inclined planes.AD- •If constructing a lever with the highest MA possible, where should the effort, resistance, and fulcrum be located?•Using the picture below, which machines multiply the input force?
Click on screen to continue
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Click on screen to continue
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Thank You for Playing Jeopardy!
Game Designed By C. Harr-MAIT