Page 3 - Lesson Notes
P. 3
D = (250 mi N – 105 mi S) – 0
D = 145 mi N
Question 2. An object moves along the grid through points A, B, C, D, E, and F as
shown below. The side of square tiles measures 0.5 km.
a) Calculate the distance covered by the moving object.
b) Find the magnitude of the displacement of the object.
Solution:
a) The distance covered by the moving object is calculated as follows:
AB + BC + CD + DE + EF
3 + 1 + 1.5 + 0.5 + 0.5 = 6.5 km
The distance covered by the moving object is 6.5 km.
b) The initial point is A and the final point is F, hence the magnitude of the displacement
is equal to the distance AF which is calculated by applying Pythagoras’s theorem to the
triangle AHF as shown in the figure below
