Question 16 — When the pole of a bar - Questions at the end of the chapter - Chapter 6 - How Forces Affect Motion (Exploration)

Last updated at August 25, 2026 by

Q 16
Question · Revise, Reflect, Refine, Q16, page 113

When the pole of a bar magnet is brought near a magnetic compass, both exert equal and opposite magnetic forces on each other. But the compass needle moves and the bar magnet does not. Explain why.

Question 16 — When the pole of a - How Forces Affect Moti - [Teachoo] - Questions at the end of the chapter
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Answer
  • The two forces are equal in magnitude.
  • The compass needle is very light, so a = F/m gives it a large acceleration and it turns.
  • The bar magnet is much heavier, so the same force gives it a very small acceleration, which we cannot notice.
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