Find the odd one out based on the fundamental nature of the force (Contact vs Non-contact):

Find the odd one out based on the fundamental nature of the force (Contact vs Non-contact):
  1. Earth pulling an apple downward
  2. A magnet attracting steel clips
  3. A boy dragging a wooden box with a rope
  4. A rubbed plastic rod attracting small bits of paper

Solution

Dragging a box with a rope requires a contact force, whereas gravitational, magnetic, and electrostatic forces are non-contact forces.

Asked in: Homi Bhabha Practice

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