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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 force
B
input work
C
input distance
D
output work
2) No machine can every be 100 percent efficient in real life.
A
True
B
False
3) Pulleys are capable of all of the following EXCEPT
A
creating energy
B
changing the direction of input force
C
multiplying input forces and changing the direction of input forces
D
multiplying input forces
4) In which type of lever is the fulcrum located in between the load and the input force?
A
not possible
B
2
C
3
D
1
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
5
B
3
C
4
D
2
6) In which part of a pendulum's swing is it moving the fastest?
A
Cannot be determined
B
At the bottom of its swing
C
Right when it is let go
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 input force by the output force
C
count the number of pulleys
D
subtract the number of pulleys from the number of ropes
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
3.9
B
10
C
9.8
D
6.4
*select an answer for all questions
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