Tag: common machines

Quizzes (4) Questions (140)

Questions Related to common machines

Multiple choice physics simple machine common machines terms related to machines introduction to simple machines

The ratio of the work output to the work input of a machine is

  1. mechanical advantage

  2. efficiency

  3. work

  4. power
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste. In more mathematical or scientific terms, it is a measure of the extent to which input is well used for an intended task or function (output).

Multiple choice physics simple machine common machines terms related to machines introduction to simple machines

An oar is used to row a boat. The distance between the oar lock (fulcrum) and the rower's hand is $104 cm$. This distance is considered

  1. the effort distance

  2. the resistance distance.

  3. the mechanical advantage of the oar

  4. the effort force
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

the distance between fulcrum and effort is called effort distance.
Option A is correct

Multiple choice physics simple machine common machines terms related to machines introduction to simple machines

The mechanical advantage of each machine is determined by

  1. adding the mechanical advantage for each simple machine

  2. finding the simple machine with the largest mechanical advantage

  3. finding the average mechanical advantage for the simple machines

  4. multiplying the mechanical advantage for each simple machine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The mechanical advantage of each machine is determined by  multiplying the mechanical advantage for each simple machine.
Option D is correct

Multiple choice physics simple machine common machines terms related to machines introduction to simple machines

In a lifting machine, an effort of $500$ N is to be moved by a distance of $20$ m to raise a load of $10000$ N by a distance of $0.8$ m. Determine the velocity ratio and mechanical advantage?

  1. 10 and 35

  2. 20 and 35

  3. 10 and 25

  4. 25 and 20
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Distance moved by effort is 20m,that of load is 0.8m

$VR=\dfrac{{E}{} _{d}}{{L}{} _{d}}$

$VR=\dfrac{20}{0.8}$

$VR=25$

the load is 10,000N and effort=500N

$MA=\dfrac{{load}{} _{d}}{{effort}{} _{d}}$

$MA=\dfrac{10000}{500}$

$MA=20$