Answer:
Explanation:
Given
school bus picks up brain in front of his house and takes him on a straight line 2.1 km to the school
It is given that brain house is origin so
(a) Position of school is +2.1 km
(b)Displacement while walking home -2.1 km
(c)Combination of both =2.1-2.1=0 km
Final displacement is zero