JAMB - Physics (1988 - No. 2)
A lorry travels 10km northwards, 4km eastwards, 6km southwards, 4km westwards to arrive at a point T. What is the total displacement?
6km south
4km north
6km north
4km east
Paliwanag
Resultant Vertical movement of lorry = 10 - 6 = 4km
Resultant horizontal movement of lorry = 4 - 4 = 0km
Therefore, the total displacement is 4 km north because the final position is directly above the starting point on the y-axis, with no displacement in the x-direction.