If a body has no acceleration:

Correct answer: d i, ii and iii

No acceleration means the resultant force F = 0 (ii), an unchanged velocity u = v (iii), and, with zero force, the work W = F s = 0 (i).

Why the other options are wrong

• a i: Not i alone: with no acceleration the resultant force is zero and the velocity does not change, so ii and iii are true as well.
• b ii: Not ii alone: with zero force the work W = F s is zero too and the velocity does not change, so i and iii are true as well.
• c i and ii: iii is left out: with no acceleration the velocity does not change, so the initial velocity u equals the final velocity v, and all three are true.