a) Displacement is a distance between the start and the finish: 4
b) Distance: total length: 2+4+2=8
Explanation:
A girl goes for a walk. Her motion is recorded on the coordinate plane below. On the plane, each block represents 1 km.
(a) We need to find the displacement of the girl. The displacement of a particle is equal to the shortest path covered by her. In the given graph, the initial position of the particle is A and finally it comes to point B. So, the displacement of the girl is 4 km.
(b) The distance walked by the girl is equal to the total path covered by her during her entire motion. So, the distance walked by the girl is 2 km + 4 km + 2 km = 8 km.
Hence, this is the required solution.
