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2. motion in straight line — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics2. motion in straight line1 Mark
MCQ
A moves with $65 \,km/h $ while $B$ is moving in same direction of $A$ with $80\, km/h$. The relative velocity of $B$ with respect to $A$ is......... $km/h$
  • A
    $80$
  • B
    $60$
  • ✓
    $15$
  • D
    $145$
✓

Answer

Correct option: C.
$15$
c
(c) ${\vec v_B} + {\vec v_A} = 80 - 65 = 15\,km/hr$

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