Two students are preparing a chart to show how forces are represented in diagrams.
a. (i) Explain why an arrow is preferred over a simple line to represent a force.
b. (ii) Using the same scale, describe how you would draw on paper a force of 20N acting due east and a smaller force of 10N acting due west so that their difference in magnitude is clearly visible.
c. (iii) Distinguish between balanced forces and unbalanced forces with reference to their vector sums.