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