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What is newton third law of motion ?

  • Every body maintains its initial state rest or motion unless no external force is applied.
  • The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.
  • To every action there is equal and opposite reaction.
  • None of above.

Answer: Option C

Explanation:

Newton First Law of Motion : Every body maintains its initial state rest or motion unless no external force is applied.

Newton Second Law of Motion : The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.

Similar Questions :

1. When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body.

  • True
  • False

Answer: Option A

Explanation:

TRUE, it is Archimedes Principle.

2. David Hughes invented

  • Machine Gun
  • Microphone
  • Microscope
  • Motorcycle

Answer: Option B

Explanation:

David Hughes of USA invented Microphone in 1878,

Machine Gun was invented by Richard Gatling of USA in 1861,

Microscope was invented by Z. Jansen of Netherlands in 1590,

Motorcycle was invented by Edward Butler of England in 1884.

3. Scalar Quantities are

  • physical quantities which have magnitude only and no direction
  • physical quantities which have no magnitude only and only direction
  • physical quantities which have magnitude only and direction
  • physical quantities which have no magnitude and no direction

Answer: Option A

4. Which law is also called law of inertia ?

  • Newton first law
  • Newton second law
  • Newton third law
  • All of above

Answer: Option A

5. Device used to measure potential difference between two points in a circuit is ?

  • Ammeter
  • Galvanometer
  • Voltmeter
  • None of above

Answer: Option C

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