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