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Samuels PS Simple Machines
Test Description: Physical Science Simple Machines
Instructions: Answer all questions to get your test result.
1) What are devices designed to do work called?
A
power
B
forces
C
mechanics
D
machines
2) If you apply the law of conservation of energy to simple machines then which of the following is true?
A
work input work output
B
machines cannot create energy
C
work put into the machine is less that the work received from the machine
D
machines can return more work than it receives
3) What is a measure of how well a machine converts input work into output work?
A
effort
B
efficiency
C
power
D
reliability
4) What type of lever has the fulcrum on one end and the output on the other end?
A
class 2
B
class 1
C
class 4
D
class 3
5) What type of simple machine is a sloping surface that allows an object to be raised without lifting it up?
A
inclined plane
B
wedge
C
pulley
D
screw
6) What type of simple machine is a ferris wheel?
A
pulley
B
wheel and axle
C
screw
D
lever
7) What type of simple machine resembles an incline plane wrapping around a rod?
A
pulley
B
lever
C
wedge
D
screw
8) What type of simple machine has a rope or cable that passes over a wheel to keep the force the same or multiply it?
A
pulley
B
lever
C
wheel and axle
D
screw
9) What type of simple machine is a knife?
A
screw
B
wedge
C
lever
D
none of these
10) Can a simple machine lose work input (produce less work that was put in)?
A
yes
B
no
*select an answer for all questions
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