Tag: common machines

Questions Related to common machines

Indentify the following:
- It uses Integrated Circuit assemblies as memory to store data persistently.
- It has no moving mechanical (D) MI of these components and it is typically more resistant to physical shock.

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

  1. Hard disk drive

  2. Solid-state drive

  3. Magnetic tape drive

  4. All of these

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Correct Option: B

A simple machine is a device that makes work easier by :

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

  1. Multiplying force

  2. Multiplying speed

  3. Applying force at a convenient point

  4. Applying force in a convenient direction

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Correct Option: A,B,C,D

Which of the following is a simple machine?

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

  1. Car

  2. Lever

  3. Computer

  4. Air conditioner

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Correct Option: B

If a machine is lubricated with oil

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

  1. The mechanical advantage of the machine increases

  2. the mechanical effciency of the machine increases

  3. both its mechanical advantage and efficiency increase

  4. its efficiency increses, but its mechanical advantage decreases.

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Correct Option: A

In an ideal mechanical the output energy is :

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

  1. more than input energy

  2. equal to input energy

  3. less than input energy

  4. infinite compared to input energy

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Correct Option: A
Explanation:

Ideal machine. The term ideal machine refers to a hypothetical mechanical system in which energy and power are not lost or dissipated through friction, deformation, wear, or other inefficiencies.The mechanical efficiency of a simple machine is calculated by dividing the actual power output by the ideal power output.

A ________ is used to lift heavy objects.

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

  1. Lever

  2. Wheel

  3. Pulley

  4. Knife

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Correct Option: A,C

For every turn of a screw jack:

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

  1. object would be lifted up by the distance between two successive threads

  2. object will be lifted up by half the distance between two successive threads

  3. object will be lifted up by twice the distance between two successive threads

  4. none of the above

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Correct Option: A

Mechanical advantage of a first order lever is :

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

  1. >1

  2. $\geq 1$

  3. < 1

  4. $\leq 1$

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Correct Option: B

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