Tag: common machines

Questions Related to common machines

Which of the following does not represent a simple machine?

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

  1. Lever

  2. Pulley

  3. Gear

  4. Steam engine

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Correct Option: D

Simple machines help us to do work more:

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

  1. Easily

  2. Quickly

  3. None

  4. Both A and B

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Correct Option: A
Explanation:

simple machines help us work more easily and quickly. 

The radius of the press cylinder in a hydraulic press is equal to the diameter of its pump cylinder. Its mechanical advantage is __________.

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

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: D

A device which helps to lift heavy loads or speed up the motion or change the direction of force in the desired direction.

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

  1. Machine

  2. Magnets

  3. Motor

  4. All

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Correct Option: A
Explanation:

A machine is a device which helps us to lift heavy loads or speed up the motion or change the direction of force in the desired direction. It can be used to obtain a gain in speed or in many more actions.

Any sloping flat surface along which a load can be easily pushed or pulled is called

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

  1. Inclined plane

  2. Wedge

  3. Screq

  4. Lever

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Correct Option: A
Explanation:

Any sloping flat surface along which a load can be easily pushed or pulled is called Inclined plane. An inclined plane is a sloping surface behaving like a simple machine and has a mechanical advantage of always greater than 1.

Simple machine is classified into ....... major classes.

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

  1. 6

  2. 3

  3. 4

  4. 5

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Correct Option: A
Explanation:
  • Six classes of simple machine are
  • Inclined plane.
  • Lever.
  • Pulley.
  • Screw.
  • Wedge.
  • Wheel and axle.

An external force applied to a simple machine to overcome the load is effort.

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

  1. True

  2. False

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Correct Option: A

State true or false.
A crow bar is used for tearing a part a piece of wood.

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

  1. True

  2. False

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Correct Option: B

State true or false.
A doorknob is an example of wheel and axel.

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

  1. True

  2. False

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Correct Option: A

Simple machines make work easier by trading _____ for force.

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

  1. distance

  2. work

  3. friction

  4. motion

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Correct Option: A
Explanation:
Simple machines make work easier to do by decreasing the force required by increasing  the distance over which the work is done. 
Therefore, option A is correct.