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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
three
C
six
D
eight
2) Which of these cannot be done by a machine?
A
multiply energy
B
multiply force
C
change direction of a force
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
power
B
resistance
C
efficiency
D
mechanical advantage
5) To raise a resistance 4 m, the effort rope of a single fixed pulley must move ___.
A
4 m
B
1 m
C
2 m
D
8 m
6) The ideal mechanical advantage of a pulley system in which five ropes support an object is ___
A
2.5
B
10
C
5
D
25
7) In a wheel and axle, the resistance force is usually exerted by the ___.
A
axle
B
larger wheel
C
gear ratio
D
pedals
8) The IMA of an inclined plane 8 m long and 2 m high is ___.
A
2
B
4
C
16
D
8
9) As the efficiency of a machine increases, the ___ of the machine increases.
A
work input
B
IMA
C
friction
D
work output
10) The IMA of an inclined plane can increased by ___.
A
decreasing the length
B
increasing the height
C
increasing the length
D
making its surface smoother
*select an answer for all questions
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