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WorksheetsSimple Machines: First Class Levers
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
An example of a lever is a ...
a)
pulley
b)
bicycle
c)
scissors
d)
screw
2.
For a lever to be a first class lever the fulcrum needs to be ..
a)
between the load and the effort
b)
on one side and the load and effort on the other side
c)
on the same side as the load arm.
3.
A force multiplier is a simple machine that multiplies your ...
a)
strength
b)
effort
c)
load
d)
speed
4.
A lever is used to raised a 12 kilograms mass with a effort that is only 4 kilograms. What is the mechanical advantage ?
a)
12
b)
4
c)
3
d)
32
5.
When you kick a ball the fulcrum is your ..
a)
foot
b)
ball
c)
leg
d)
knee
6.
When you rub two surfaces together it's called
a)
speed
b)
friction
c)
effort
d)
joules
7.
Effort is
a)
An inclined plane wrapped around a rod
b)
A unit used for measuring force
c)
How far an object moves in a certain amount of time
d)
The force applied to a simple machine
8.
If the fulcrum is closer to the effort, it will take
a)
more force to lift the load
b)
less force to lift the load
c)
equal force to the lift the load
d)
no force to life the load
9.
In a first class lever, the _____ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
d)
Machine
10.
Which of the following does a simple machine NOT do?
a)
Increase the force applied
b)
Increase the distance the force is applied over
c)
Change the direction the force is applied
d)
Change the amount of work that needs to be done
11.
Which of these is not part of the lever?
a)
Object
b)
Fulcrum
c)
Load
d)
Lever
12.
The force placed on the simple machine to move the load is called the ____.
a)
Effort
b)
Fulcrum
c)
Load
d)
Lever
13.
Simple machines allow us to do less work.
a)
TRUE
b)
FALSE
14.
Simple machines make the work we have to do easier, but it is still the same amount of work.
a)
TRUE
b)
FALSE
15.
A machine multiplies your effort force by 3 times. What does the number 3 represent?
a)
force
b)
mechanical advantage
c)
distance
d)
work
16.
What is the fixed point around which a lever is free to turn?
a)
fulcrum
b)
resistance
c)
effort
d)
lever
17.
What is the metric unit for work?
a)
meter
b)
newton
c)
joule
d)
miles
18.
What is the formula for calculating work?
a)
F = w/d
b)
w= f x d
c)
d = w/f
d)
ma = Fr/Fe
19.
What is the formula for calculating mechanical advantage?
a)
F = w/d
b)
ma = Fr/Fe
c)
ma = F x D
d)
ma = M + A
20.
Select all the simple machines
a)
Levers
b)
Inclined Planes
c)
Screws
d)
Wedges
e)
Wheel and axles
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