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