Two blocks are on a smooth horizontal line, 2 m apart, joined to the ends of a spring of force constant 200 N m⁻¹. Which statements are correct?

Select all that apply

• Option A

  If both blocks are displaced by 0.5 m in the same direction, spring force is zero.

• Option B

  If they are displaced by 0.5 m in opposite directions, spring force magnitude is 200 N.

• Option C

  Equal same-direction displacement changes the spring length by 1 m.

• Option D

  Opposite displacements of 0.5 m each change spring length by 1 m.