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