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