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POE 1.1 S M Problems-Calc Flashcards | StudBud
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POE 1.1 S M Problems-Calc
POE 1.1 S M Problems-Calc
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Calculator; Formulas #work #simplemachines #mechanicaladvantage #physicalscience #science
Flashcards
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Questions
10
Answers
1
The box is filled with books and weighs 150 lb. You use a force of 75 lb applied to the ramp.
MA = 2
MA = 0.5
2
How do you calculate the MA of a compound machine?
you add the MAs of the individual machines
The total MA is Output/ Input
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you multiply the MAs of the individual machines
3
Where should the fulcrum be located to have the greatest mechanical advantage?
Close to the load
Close to effort
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In the middle
4
In what way are all simple machines alike?
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All were used in all ancient civilizations.
All move about a fulcrum.
All make work easier.
5
Anne is using a fixed pulley to raise a weight. How does using the pulley change her effort?
It changes the direction of the effort but doesn't reduce it
It both reduces and changes the direction of the effort.
It reduces the effort needed to raise the weight.
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6
In order for a lever to multiply its effort force,
its effort arm must equal its resistance arm
its effort arm should be longer than its resistance arm
its resistance arm must be longer than its effort arm
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7
What does it mean if a machine has a high mechanical advantage?
It was easier to do the work.
It was more difficult to do the work.
8
Find the force needed to lift a 300 lb weight using a machine with a MA of 15.
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100 lb
20 lb
200 lb
9
A heavy box is pushed up an inclined plane. What is the mechanical advantage?
0.33 meters
3
3 meters
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10
What would happen to the MA if the diameter of the doorknob were doubled?
It would be divided by 2
It would be multiplied by 4
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It would be multiplied by 2
