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Worksheetssimple machines test
Total questions: 40
Worksheet time: 33mins
Name
Class
Date
1.
Mechanical Advantage (MA) is:
a)
Ratio of the magnitude of the resistance and effort forces
b)
Ratio of distance traveled by the effort and the resistance force
c)
All of the above
d)
None of the above
2.
If MA is greater than 1:
a)
Proportionally less effort force is required to overcome the resistance force
b)
Proportionally greater effort force is required to overcome the resistance force
c)
Proportionally less effort distance is required to overcome the resistance force
d)
MA cannot be greater than 1
3.
Which simple machine will have a mechanical advantage less than 1?
a)
crane
b)
weight machine
c)
a windmill
d)
a conveyer belt
4.
An inclined plane is 15 meters long and raises 3 meter high. If you want to push a 20 N box up the inclined plane, how much effort force will you need? Remember, FeDe = FrDr
a)
900 N
b)
4 N
c)
2.25 N
d)
100 N
5.
A pulley brings a 100 kg piano up into a second story window. What is the ideal mechanical advantage if the pulley has 5 strands?
a)
20
b)
500
c)
5
d)
0.05
6.
Tommy and Jimmy are on a seesaw like the picture. Tommy weighs 40 lb and Jimmy weighs 30 lb. What is the Mechanical Advantage when Jimmy makes the two boys level?
a)
1.3
b)
0.75
c)
1
d)
120
7.
A wheelbarrow is carrying 50 lb of cement. The radius of the wheel is 10 inches and the radius of the axel is 4 inches. What effort force is needed to move the cement if the axle is driving the wheel? Remember FeDe = FrDr
a)
12.5 lb
b)
125 lb
c)
4 lb
d)
20 lb
8.
Mrs. Cruz wants to lift a bag of chocolates in a crane vending machine. The chocolate weighs 2 lb. When she pulled the crane with her force sensor, she saw that she put in 1.5 lb of force effort. What is the mechanical advantage of the crane?
a)
1.33
b)
0.75
c)
2
d)
1.5
9.
David wants to lift Moses using a moveable pulley. If Moses weighs 150 lbs, and David uses a force of 30 lbs, how much is the mechanical advantage?
a)
10
b)
450
c)
5
d)
8
10.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
11.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
12.
The device used to raise a flag up a flag pole is an example of a
a)
wheel and axle
b)
lever
c)
inclined plane
d)
pulley
13.
An inclined plane wrapped around a rod forms this simple machine
a)
lever
b)
pulley
c)
screw
d)
wedge
14.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum
15.
A seesaw is an example of a
a)
wedge
b)
lever
c)
inclined plane
d)
pulley
16.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
17.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
18.
The fixed point on the lever is called
a)
load
b)
resistance
c)
bar
d)
fulcrum
19.
Name this simple machine.
a)
Pulley
b)
Wheel and Axle
c)
Inclined Plane
d)
Lever
20.
What is effort (input) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
21.
What is resistance (output) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
22.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
23.
Efficiency (%) is a measurement of how much _________ is produced by a machine.
a)
work
b)
friction
c)
force
d)
weight
24.
Due to CONSTANT CONTACT with a surface, which simple machine will have the LOWEST EFFICIENCY?
a)
inclined plane
b)
pulley
c)
lever
25.
What is the MA for the pulley shown?
a)
1
b)
2
c)
3
d)
0
26.
How much force will the pulley generate if I input (red arrow) 100 N of force?
a)
100 N
b)
0 N
c)
300 N
d)
200 N
27.
What class lever is this
a)
1
b)
2
c)
3
28.
What class lever is this
a)
1
b)
2
c)
3
29.
What class lever is this
a)
1
b)
2
30.
What class lever is this
a)
1
b)
2
c)
3
31.
What class lever is this
a)
1
b)
2
c)
3
32.
What class lever is this
a)
1
b)
2
c)
3
33.
What class lever is this
a)
1
b)
2
c)
3
34.
What class lever is this
a)
1
b)
2
c)
3
35.
What class lever is this
a)
1
b)
2
c)
3
36.
What class lever is this
a)
1
b)
2
c)
3
37.
To make this rock more more easily, should he move the fulcrum closer to himself?
a)
Yes
b)
No
38.
To make this rock more more easily, should he move the fulcrum closer to himself?
a)
Yes
b)
No
39.
A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?
a)
lever, wheel and axle, pulley
b)
wheel and axle, inclined plane, pulley
c)
wheel and axle, pulley, inclined plane
40.
A machine multiplies your effort force by 3 times. What does the number 3 represent?
a)
force
b)
mechanical advantage
c)
distance
d)
work
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