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Physics: Chapter 9
Test Description: Part 3
Instructions: Answer all questions to get your test result.
1) Levers, inclined planes (and most simple machines) increase input force at the expense of what?
A
output work
B
input distance
C
input work
D
output force
2) No machine can every be 100 percent efficient in real life.
A
False
B
True
3) Pulleys are capable of all of the following EXCEPT
A
creating energy
B
multiplying input forces
C
changing the direction of input force
D
multiplying input forces and changing the direction of input forces
4) In which type of lever is the fulcrum located in between the load and the input force?
A
1
B
3
C
2
D
not possible
5) A pulley system consists of 3 pulleys that lift a 1500 N crate 500 meters. What is the mechanical advantage of the pulley system?
A
4
B
5
C
2
D
3
6) In which part of a pendulum's swing is it moving the fastest?
A
Cannot be determined
B
Right when it is let go
C
At the bottom of its swing
D
At the top of its swing
7) Machines are capable of creating energy.
A
False
B
True
8) How can a pulley system's mechanical advantage be calculated simply?
A
multiply the number of pulleys by the number of ropes
B
subtract the number of pulleys from the number of ropes
C
subtract the input force by the output force
D
count the number of pulleys
9) In a perfect world, the total energy of a pendulum would never change.
A
True
B
False
10) "g" is equal to what number at Earth's surface?
A
6.4
B
3.9
C
10
D
9.8
*select an answer for all questions
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