A body walks uniformly along the sides of a rectangular park of size 400m ×300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect ?

Dispacement AC→ = AB→ +BC→AC = (AB)2+(BC)2 = (400)2+(300)2 = 500 mDistance = AB + BC = 400+300 = 700 m

A body walks uniformly along the sides of a rectangular park of size 400m ×300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect ?

Dispacement AC→ = AB→ +BC→AC = (AB)2+(BC)2 = (400)2+(300)2 = 500 mDistance = AB + BC = 400+300 = 700 m

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A body walks uniformly along the sides of a rectangular park of size 400m $\times$ 300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect ?

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His displacement is 500 m

He has travelled a distance of 700 m

His displacement is 700 m

His velocity is not uniform throughout the walk

answer is B.

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Detailed Solution

Dispacement $\vec{AC} = \vec{AB} + \vec{BC}$

AC = $\sqrt{{(AB)}^{2} + {(BC)}^{2}} = \sqrt{{(400)}^{2} + {(300)}^{2}} = 500 m$

Distance = AB + BC = 400+300 = 700 m

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A body walks uniformly along the sides of a rectangular park of size 400m ×300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect ?

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A body walks uniformly along the sides of a rectangular park of size 400m $\times$ 300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is incorrect ?