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Levers And Pulleys Test Review
Test Description: Test Review
Instructions: Answer all questions to get your test result.
1) A change in direction that results from passing a rope through a pulley
A
effort
B
directional advantage
C
newton
D
mechanical advantage
2) Reduces the effort needed to lift a load or overcome resistance.
A
mechanical advantage
B
newton
C
directional advantage
D
effort
3) As effort decreases with a pulley, the length the rope must be pulled increases.
A
false
B
true
4) The greater the number of ropes supporting the load, the less effort needed to lift the load.
A
true
B
false
5) You can predict the effort needed to lift a load by knowing the weight of the load AND...
A
the number of ropes that support the load.
B
the number of ropes touching just the fixed wheel.
C
effort is pulled down
D
the number of pulley wheels in the system.
6) If a pulley system has 4 ropes supporting it, how much effort is needed to lift the load?
A
1/2
B
1/8
C
1/3
D
1/4
7) If a pulley system has 6 ropes supporting the load, how much effort is needed to lift the load?
A
1/3
B
1/6
C
1/8
D
1/4
8) A load weighs 20 N and there are 4 pulley ropes supporting the load. How much effort will it take to lift the load?
A
3 Newtons of effort
B
2 Newtons of effort
C
5 Newtons of effort
D
10 Newtons of effort
9) A load is pulling with a force of 100 Newtons. How many ropes does my pulley system need to have supporting the load if I want to reduce my effort to 20 N.
A
5 ropes
B
4 ropes
C
10 ropes
D
2 ropes
10) Which kind of pulley system does NOT give you a mechanical advantage?
A
single fixed
B
single moveable
C
single fixed, single moveable effort up
D
single fixed, single moveable effort down
11) On a spring scale, what do the dark , longer lines represent?
A
2 N
B
5 N
C
10 N
D
1 N
12) A fixed pulley is being used to lift a load of 5N. How many Newtons of effort will be needed?
A
5N
B
10N
C
1N
D
2.5N
13) A class ___ lever has the fulcrum in the middle.
A
2
B
1
C
4
D
3
14) A broom is an example of a class ___ lever.
A
1
B
3
C
2
15) To make a load easier to lift, I should move my effort farther from the fulcrum.
A
true
B
false
16) How can you adjust the load on a lever to make the effort less?
A
move it on top of the effort
B
move it closer to the fulcrum
C
move it farther away from the fulcrum
17) A wrench is an example of a class ____ lever.
A
1
B
2
C
3
18) A hammer can represent two different lever classes depending on how you use it.
A
true
B
false
19) Which of these pairs of levers belongs to the same class?
A
scissors and a shovel
B
a see-saw(teeter totter) and a tennis racket
C
nutcraker and broom
D
can opener and tweezers
20) What do the smaller lines on a spring scale represent?
A
hundredths
B
ones
C
tenths
*select an answer for all questions
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