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Using Machines
Contributed by: Wood
  • 1. A force that opposes sliding motion between two touching surfaces.
A) input force
B) output force
C) friction
D) efficiency
E) machanical advantage
  • 2. Output force divided by input force equals ________ .
A) conservation
B) mechanical advantage
C) distance output
D) efficiency
E) human advantage
  • 3. Lubrication can reduce the _______________ between two surfaces.
A) friction
B) efficiency
C) magnetic force
D) output force
E) mechanical advantage
  • 4. The ____________ work done by a machine can never be greater than the __________ done on the machine.
A) efficiency, advantage
B) input work, output work
C) fishing, hunting
D) output work, input work
E) advantage, efficiency
  • 5. When you remove a nail with a hammer the nail is remove by the _____________ .
A) input force
B) output advantage
C) output force
D) input advantage
E) friction
  • 6. Even though machines make work easier they _________________ the amout of work you need to do.
A) do decrease
B) stop
C) change
D) don't decrease
E) don't increase
  • 7. The force that you apply on a machine is the _______ .
A) applied advantage
B) input force
C) mechanical advantage
D) output force
E) MA
  • 8. The _____________ of a machine is the ratio of the output work to the input work.
A) raw rate
B) efficiency
C) imprint of work
D) opposing effort
E) total effort
  • 9. F out / F in equals _____ .
A) FA
B) AM
C) EF
D) PA
E) MA
  • 10. The force that the machine applies is ________ .
A) mechanical advantage
B) applied advantage
C) input force
D) output force
E) Input advantage
  • 11. W out / W in equals _____ .
A) human output
B) ffa
C) eff
D) ma
E) off
  • 12. The work that the machine does is the ________ .
A) output work
B) output advantage
C) human effort
D) input work
E) output force
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