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Using Machines
Contributed by: Wood
  • 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) conservation
B) distance output
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) advantage, efficiency
B) input work, output work
C) efficiency, advantage
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) output force
C) output advantage
D) input advantage
E) input force
  • 6. Even though machines make work easier they _________________ the amout of work you need to do.
A) don't decrease
B) stop
C) don't increase
D) do decrease
E) change
  • 7. The force that you apply on a machine is the _______ .
A) input force
B) mechanical advantage
C) MA
D) output force
E) applied advantage
  • 8. The _____________ of a machine is the ratio of the output work to the input work.
A) raw rate
B) total effort
C) opposing effort
D) imprint of work
E) efficiency
  • 9. F out / F in equals _____ .
A) EF
B) MA
C) PA
D) FA
E) AM
  • 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) human output
B) ma
C) eff
D) ffa
E) off
  • 12. The work that the machine does is the ________ .
A) output advantage
B) output force
C) output work
D) human effort
E) input work
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