Per NCERT, when you WALK forward, what is the force pair?
ABoth forces are in the same direction
BYou push gravity; gravity pushes you
CYou don't apply any force
DYour foot pushes the ground BACKWARD; the ground pushes your foot FORWARD (via friction) — moving you ahead
Answer & Solution
Correct answer: D. Your foot pushes the ground BACKWARD; the ground pushes your foot FORWARD (via friction) — moving you ahead
Per NCERT §6.6, walking = foot pushes ground backward, ground reacts forward (via friction). The other options misstate.
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