science
Grade-11
Easy

Question

If a car moves 10 m in the north direction and 5 m in the west direction, then find the resultant.

  1. 11.18
  2. 21.3
  3. 16.5
  4. 12.3

hintHint:

Use the formula To find the resultant of two vectors.

The correct answer is: 11.18


    • If two vectors A and B with magnitude a and b respectively are given and the angle between them is θ Then the magnitude of the Resultant of A and B is R = square root of a squared space plus space b to the power of 2 space end exponent plus space 2 a b space cos theta end root
    • So R = square root of 10 squared space plus space 5 to the power of 2 space end exponent plus space 2 cross times 5 cross times 10 space cos 90 end root
    • R = square root of 100 space plus space 25 space plus space 0 space end root
    • R = 11.3 (approx)

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