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Levers And Pulleys Review
Test Description: Use this review to help you prepare for the Levers and Pulleys test.
Instructions: Answer all questions to get your test result.
1) The pivot point in a lever system is called a(n)...
A
fulcrum.
B
load.
C
effort
D
lever arm.
2) The unit used to measure force is called a...
A
gram.
B
liter.
C
meter.
D
newton.
3) A baseball bat is one type of lever system. What class lever is it?
A
Class-2
B
Class-1
C
Class-1 and Class-3
D
Class-3
4) Which of the pairs of levers belongs to the same class?
A
Tweezers and Scissors
B
Fishing Rod and Fly Swatter
C
Teeter-totter and Hockey Stick
D
Nutcracker and Broom
5) What should you always do first with a spring scale?
A
Turn it upside down.
B
Zero it out.
C
Pull on the hook.
D
Attach it to the rope.
6) A single-fixed pulley is useful, because...
A
it gives you a mechanical advantage.
B
it lessens the effort required to lift a load.
C
it gives you a directional advantage.
D
it increases the effort required to lift a load.
7) A single-movable pulley system can pose a challenge, because...
A
you can only lift the load as high as the level you are at.
B
it does not decrease the amount of effort required to lift a load.
C
you will have less rope to pull.
D
a directional advantage changes the direction of the effort.
8) What happens to the amount of effort required to lift a load on a lever when you move the effort closer to the fulcrum?
A
You need more effort.
B
You need the same amount of effort.
C
Nothing changes.
D
You need less effort.
9) Since the load on a nutcracker is found in the middle, it is a class-? lever.
A
1
B
4
C
3
D
2
10) What pulley system does not give an advantage by reducing effort?
A
Single-Fixed/Single-Movable that you pull up on.
B
Single-Fixed
C
Single-Fixed/Single-Movable that you pull down on.
D
Single-Movable
11) If a pulley system had FOUR segments of rope that help lift the load, what is the effort reduced by?
A
It is not reduced, it is four times harder to lift the load.
B
One Third
C
One Fourth
D
One Half
12) What is the fulcrum?
A
The fullest point of the lever.
B
Where the load is attached on a pulley system.
C
The mass the lever lifts.
D
The point where the lever arm pivots.
13) The mass lifted or the resistance overcome on a lever is called what?
A
Effort
B
Load
C
Fulcrum
D
Arm
14) What two things make up work?
A
Force and Distance
B
Force and Load
C
Fulcrum and Force
D
Time and Distance
15) What situation would give you a mechanical advantage?
A
Sliding a chair across the room.
B
Using a fixed-pulley system.
C
Using a fly swatter.
D
Lifting a large box.
16) What situation would give you a directional advantage?
A
Using a lever to lift a load upward.
B
Using a movable-pulley system.
C
Using a fixed-pulley system.
D
Turning your bike sharply around a corner.
*select an answer for all questions
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