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Using Machines
Contributed by: Wood
  • 1. A force that opposes sliding motion between two touching surfaces.
A) input force
B) efficiency
C) machanical advantage
D) friction
E) output force
  • 2. Output force divided by input force equals ________ .
A) conservation
B) efficiency
C) human advantage
D) mechanical advantage
E) distance output
  • 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) advantage, efficiency
B) input work, output work
C) fishing, hunting
D) output work, input work
E) efficiency, advantage
  • 5. When you remove a nail with a hammer the nail is remove by the _____________ .
A) friction
B) output force
C) output advantage
D) input advantage
E) input force
  • 6. Even though machines make work easier they _________________ the amout of work you need to do.
A) stop
B) do decrease
C) don't decrease
D) change
E) don't increase
  • 7. The force that you apply on a machine is the _______ .
A) applied advantage
B) MA
C) output force
D) mechanical advantage
E) input force
  • 8. The _____________ of a machine is the ratio of the output work to the input work.
A) opposing effort
B) total effort
C) imprint of work
D) efficiency
E) raw rate
  • 9. F out / F in equals _____ .
A) MA
B) EF
C) FA
D) AM
E) PA
  • 10. The force that the machine applies is ________ .
A) input force
B) mechanical advantage
C) output force
D) Input advantage
E) applied advantage
  • 11. W out / W in equals _____ .
A) off
B) eff
C) human output
D) ffa
E) ma
  • 12. The work that the machine does is the ________ .
A) output force
B) human effort
C) input work
D) output advantage
E) output work
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