Answer:
Explanation: Let us represent displacement of dog in vector form
Let us consider east as + x axis and north as + y - axis
28 m east = 28 i
35 m at 69 degrees east of north
35 sin69 i + 35 cos69 j
= 32.67 i +12.54 j
31 m at 41 degrees west
31m (90-69)+41 = 62 degree north of east
= 31 cos62 i + 31sin62 j
= 14.55 i + 27.37 j
Total displacement
= 28 i +32.67 i +12.54 j +14.55 i + 27.37 j
= 75.22 i +39.91 j
Amplitude
= √ 75.22² + 39.91²
= 85 m
