science
Grade-11
Easy

Question

If a car is moving to 400 m/s North , and 300 m/s East. What is the relative velocity?

 

  1. 20
  2. 30
  3. 50
  4. 600

hintHint:

50 m/s

The correct answer is: 50


    V subscript R space equals space square root of V subscript N squared space plus space V subscript E squared end root space equals space square root of 40 squared space plus space 30 squared end root
V subscript R space equals space square root of 1600 space plus space 900 end root space equals space square root of 2500
V subscript R space equals space 50 m s to the power of negative 1 end exponent
    Answer:
    The relative velocity is 50ms-1

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