A butterfly is flying with a velocity 4 2 m s - 1 in north-east direction. Wind is slowly blowing at 1 m s - 1 from north to south. The resultant displacement of the butterfly in 3 seconds is:

Question

A butterfly is flying with a velocity 4 2 m s - 1 in north-east direction. Wind is slowly blowing at 1 m s - 1 from north to south. The resultant displacement of the butterfly in 3 seconds is:, 3 m, 20 m, 12 2 m, 15 m

MARKS App · Accepted Answer

V → BW = 4 2 cos 4 5 i ^ + 4 2 sin 4 5 j ^ = 4 i ^ + 4 j ^ V → w = - j ^ V → B = V → BW + V → w = 4 i ^ + 3 j ^ S → B = V → B × t = ( 4 i ^ + 3 j ^ ) × 3 = 12 i ^ + 9 j ^ S → B = ( 12 ) 2 + ( 9 ) 2 = 15 m

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