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WorksheetsSimple Machines
Total questions: 20
Worksheet time: 26mins
Name
Class
Date
1.
What is an example of a third-class lever?
a)
broom
b)
screwdriver
c)
screw
d)
wheelbarrow
2.
What kind of lever has a fulcrum, resistance arm, and effort arm?
a)
1st Class Lever
b)
2nd Class Lever
c)
3rd Class Lever
d)
All of the above
3.
A machine multiplies your effort force by 3 times. What does the number 3 represent?
a)
force
b)
mechanical advantage
c)
distance
d)
work
4.
What kind of lever has the fulcrum between the effort and the resistance and changes the direction of a force?
a)
1st Class Lever
b)
2nd Class Lever
c)
3rd Class Lever
d)
No Class Lever
5.
What is the formula for calculating work?
a)
F = w/d
b)
w= f x d
c)
d = w/f
d)
ma = Fr/Fe
6.
What is the metric unit for work?
a)
meter
b)
newton
c)
joule
d)
miles
7.
What is the fixed point around which a lever is free to turn?
a)
fulcrum
b)
resistance
c)
effort
d)
lever
8.
A wheelbarrow, pulley, and wedge are all examples of what?
a)
levers
b)
inclined planes
c)
wheel and axel
d)
simple machines
9.
What is the scientific meaning of work?
a)
when you get paid
b)
work happens when an object changes its postion in direction of force
c)
work happens when an object does not move
d)
work happens when you think about it
10.
How does a first-class lever affect direction?
a)
It changes the direction
b)
They do not change the direction of force
c)
The direction is maintained
d)
the force is changed.
11.
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
12.
What kind of simple machine is a wheelchair ramp?
a)
wheel and axle
b)
pulley
c)
wedge
d)
inclined planes
13.
What rises when you apply effort to a movable pulley?
a)
just pulley
b)
the load
c)
entire pulley and load of object attached
d)
nothing
14.
What is the mechanical advantage of a simple machine if a force of 15 newtons lifts an object weighing 60 newtons?
a)
2
b)
45
c)
.25
d)
4
15.
If 200 joules of work was done to move an object with a force of 50 newtons, how far was the object moved?
a)
2 meters
b)
45 meters
c)
4 meters
d)
150 meters
16.
How much work is done in moving a box 20 meters, using a force of 25 newtons?
a)
500 meters
b)
500 joules
c)
45 joules
d)
5 meters
17.
One or two inclined planes that move when used. Thick at one end and thin at the other.
a)
wedge
b)
screw
c)
wheel and axle
d)
pulley
18.
A wheel attached to a shaft. A doorknob is an example.
a)
wedge
b)
screw
c)
wheel and axle
d)
pulley
19.
An inclined plane wrapped around a straight piece of metal.
a)
wedge
b)
screw
c)
wheel and axle
d)
pulley
20.
Rope, chain, or belt wrapped around a wheel that changes the direction of an applied force. Movable or fixed types.
a)
wedge
b)
screw
c)
wheel and axle
d)
pulley
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