Sunday, August 23, 2020


Force is a push or pull on an object. Force is a vector quantity. It has both magnitude and direction. SI Unit of force is Newton Symbolized as N. 1N force is that force which can accelerate 1kg mass by 1m/s2
Forces are mainly of two types

  • Contact force
  • Forces resulting from action-at-a-distance

Contact forces are those forces which are produced by contact of two objects such as

  • Frictional force
  • Tension Force
  • Normal Force
  • Air Resistance Force
  • Applied Force
  • Spring Force

Forces resulting from action-at-a-distance are such forces that result even when the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation. Examples of action-at-a-distance forces include

  • Gravitational force
  • Electrical Force
  • Magnetic Force
  • Molecular interaction force


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