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Machines
Test Description: Quiz on Chapter 7 in Glencoe Physical Science
Instructions: Answer all questions to get your test result.
1) There are ___ types of simple machines.
A
ten
B
eight
C
three
D
six
2) Which of these cannot be done by a machine?
A
change direction of a force
B
multiply force
C
multiply energy
D
work
3) In an ideal machine, the work input ___ work output
A
is greater than
B
is independent of
C
is less than
D
is equal to
4) The ___ of a machine is the number of times it multiplies the effort force.
A
mechanical advantage
B
power
C
resistance
D
efficiency
5) To raise a resistance 4 m, the effort rope of a single fixed pulley must move ___.
A
4 m
B
8 m
C
1 m
D
2 m
6) The ideal mechanical advantage of a pulley system in which five ropes support an object is ___
A
25
B
2.5
C
10
D
5
7) In a wheel and axle, the resistance force is usually exerted by the ___.
A
axle
B
larger wheel
C
pedals
D
gear ratio
8) The IMA of an inclined plane 8 m long and 2 m high is ___.
A
8
B
4
C
2
D
16
9) As the efficiency of a machine increases, the ___ of the machine increases.
A
friction
B
work output
C
work input
D
IMA
10) The IMA of an inclined plane can increased by ___.
A
increasing the length
B
increasing the height
C
making its surface smoother
D
decreasing the length
*select an answer for all questions
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