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FALSE statement about third law of motion is

  • A.Forces in nature always occur between pairs of bodies
  • B.If \(\vec{F}\) is a force on body A by body B then -\(\vec{F}\) is the force on B by body A
  • C.Action and reaction forces are simultaneous forces
  • D.Any of the two mutual forces can be called action and the other reaction
  • E.There is cause-effect relation between action and reaction

Answer: E

The false statement is there is cause-effect relation between action and reaction.

Newton's third law says forces always occur in pairs: if body B exerts a force on body A, then A exerts an equal and opposite force on B. The two forces arise together, at the same instant, from the same interaction. Neither causes the other, so there is no cause-and-effect relation between them.

The other statements are all true. Forces occur between pairs of bodies; the force on B by A is the negative of the force on A by B; action and reaction are simultaneous; and since neither comes first, either one may be called the action and the other the reaction.

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