Tag: introduction to simple machines

Questions Related to introduction to simple machines

A machine _________ be used as a force multiplier as well as speed multiplier simultaneously. Fill in the blank.

physics a little effort, lot of work motion in application common machines introduction to simple machines

  1. Can

  2. Can not

  3. Both

  4. None

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Correct Option: B
Explanation:

A machine is a device by which we can either overcome a large resistive force at same point by applying a small force.

The law of a certain lifting machine is $P =W/50+ 1.5$. The velocity ratio of the machine is 100. Find the maximum possible mechanical advantage and maximum possible efficiency of the machine

physics a little effort, lot of work motion in application common machines introduction to simple machines

  1. 50 and 50%

  2. 50 and 60%

  3. 60 and 60%

  4. 60 and 50%

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Correct Option: A

A gear is a

physics a little effort, lot of work motion in application common machines introduction to simple machines

  1. Plain Wheel

  2. Toothed Wheel

  3. Smooth Wheel

  4. None of these

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Correct Option: B

Which one of the following can also act as a lubricant in machines?

physics a little effort, lot of work motion in application common machines introduction to simple machines

  1. Iron filling

  2. Polish on machines

  3. Flow of water through the machine

  4. Flow of compressed and purified air.

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Correct Option: D
Explanation:

In the machines, the flow of compressed and purified air lowers the friction, hence it acts as a lubricant.

Graphite powder is used in machines to_______

physics common machines terms related to machines introduction to simple machines introduction to machines

  1. enhance friction

  2. enhance profit

  3. reduce friction

  4. reduce efficient

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Correct Option: C
Explanation:

Graphite powder is used in some machines to reduce friction. Ball bearing coverts sliding friction into rolling friction.

When the height of the inclined plane decreases :

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

  1. The mechanical advantage decreases

  2. The mechanical advantage increases

  3. Effort increases

  4. It will not have any effect on the mechanical advantage

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Correct Option: B
Explanation:

The mechanical advantage increases with decrease in height of inclined plane.

When the height of the inclined plane decreases :

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

  1. the mechanical advantage decreases

  2. the mechanical advantage increases

  3. effort increases

  4. it will not have any effect on the mechanical advantage

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Correct Option: B

For an ideal machine:

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

  1. Output= input

  2. Output> input

  3. Output< input

  4. Output ${\geq}$ input

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Correct Option: A
Explanation:

In an ideal machine there will be zero energy loss hence output will be equal to input

Mechanical advantage of a lever is

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

  1. load + effort

  2. load $\times$ effort

  3. $ \dfrac{load}{effort}$

  4. $ \dfrac{effort}{load}$

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Correct Option: D

Wedge is a :

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

  1. First order lever

  2. Wheel and-axle

  3. Inclined plane

  4. None of the above

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Correct Option: C