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Using Machines
  • 1. A force that opposes sliding motion between two touching surfaces.
A) machanical advantage
B) output force
C) efficiency
D) input force
E) friction
  • 2. Output force divided by input force equals ________ .
A) mechanical advantage
B) human advantage
C) conservation
D) efficiency
E) distance output
  • 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) advantage, efficiency
B) output work, input work
C) fishing, hunting
D) efficiency, advantage
E) input work, output work
  • 5. When you remove a nail with a hammer the nail is remove by the _____________ .
A) output advantage
B) friction
C) input advantage
D) output force
E) input force
  • 6. Even though machines make work easier they _________________ the amout of work you need to do.
A) don't increase
B) don't decrease
C) change
D) stop
E) do decrease
  • 7. The force that you apply on a machine is the _______ .
A) output force
B) mechanical advantage
C) input force
D) MA
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) imprint of work
D) opposing effort
E) efficiency
  • 9. F out / F in equals _____ .
A) AM
B) PA
C) MA
D) FA
E) EF
  • 10. The force that the machine applies is ________ .
A) applied advantage
B) mechanical advantage
C) Input advantage
D) input force
E) output force
  • 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 advantage
C) output work
D) human effort
E) output force
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