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Answer:
answer is 12m. ....
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Answer:
Option (a) 12m
Step-by-step explanation:
0 to 2 seconds,
area of the triangle of side 2s and height 6m/s is the first displacement,
let us denote that by d1 = 1/2 (2s) (6m/s) = 6m
2 to 4 seconds,
area of the rectangle of length,2s and breadth -3m/s is the second displacement,
let us denote that by d2 = 2s * -3m/s = -6m
4 to 8 seconds,
area of rectange of length, 4s and breadth 3m/s is the third displacement,
and let that be denoted as d3 = 4s * 3m/s = 12m
So, at the end of 8 seconds,
the total displacement = d1 + d2 + d3
= 6m + (-6)m + 12m
= 12m