Tag: terms related to machines

Questions Related to terms related to machines

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

Efficiency of machine is

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

  1. Ratio of velocity of effort to velocity of load

  2. Ratio of the load to its effort

  3. Ratio of useful work done by the machine to the work put to the machine by its effort

  4. All

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Correct Option: C
Explanation:

Mechanical advantage (MA) is the ratio of the load to its effort.
efficiency of machine (n) = MA/VR
Velocity Ratio (VR) is the ratio of the velocity of effort to velocity of load.

Relationship between the mechanical advantage and velocity ratio of an ideal machine is

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

  1. Velocity Ratio < mechanical advantage

  2. Velocity Ratio = Mechanical advantage

  3. Velocity ratio > Mechanical advantage

  4. All

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Correct Option: B
Explanation:

For ideal machine, efficiency = 1

effeciency = Mechanical advantage/ velocity ratio
So, for ideal machine, Mechanical advantage = velocity ratio

Relationship between mechanical advantage and velocity ratio for a practical machine is

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

  1. Velocity ratio = Mechanical advantage

  2. Velocity ratio > Mechanical advantage

  3. Velocity ratio < mechanical advantage

  4. All

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Correct Option: B
Explanation:

For a practical machine, velocity ratio is greater than mechanical advantage
V.R > M.A.

The ratio of the load to the effort is called.

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

  1. Mechanical advantage

  2. Velocity ratio

  3. Efficiency of machine

  4. None

Show answer
Correct Option: A
Explanation:

Ratio of load to the effort is k/a mechanical advantage of the machine. The ratio of the velocity of effort to its velocity of the load is called its velocity ratio of machine.