According to the third law of motion, action and reaction (a) always act on the same body (b) always act on different bodies in opposite directions (c) have same magnitude and directions (d) act on either body at normal to each other

Answer: (b) always act on different bodies in opposite directions

Newton’s third law of motion states that when one body exerts a force on the other body, the first body experiences a force that is equal in magnitude in the opposite direction of the force which is exerted.

Example:

let us consider a book resting on a table. The book applies a downward force equal to its weight on the table.

  • According to the third law of motion, the table applies an equal and opposite force to the book.
  • This force occurs because the book slightly deforms the table, as a result, the table pushes back on the book like a coiled spring.
  • Newton’s third law of motion implies the conservation of momentum.

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