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