Q.

A truck travelling due north at 20 ms-1 turns west and travels with same speed. What is the change in velocity?

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a

202 ms-1 south-west

b

40 ms-1 south-west

c

202 ms-1 north-west

d

40 ms-1 north-west

answer is A.

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Detailed Solution

initial velocity 20j^ and final velocity 20(-i^)change in velocity= ∆v⇀=-20i^--20j^∆v⇀=202  along south west
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A truck travelling due north at 20 ms-1 turns west and travels with same speed. What is the change in velocity?