Question

Raindrops are falling vertically with a velocity of $10\, m/s$. To a cyclist moving on a straight road the raindrops appear to be coming with a velocity of $20\, m/s$. The velocity of cyclist is:

• A. $10\, m/s$
• B. $10 \sqrt{3}\, m/s$
• C. $20\, m/s$
• D. $20\sqrt{3} m/s$

Answer 1

Answer: (B)

By using addition of vector in vector form

$V_{m} =\sqrt{(20)^{2}-(10)^{2}}$
$=\sqrt{400-100}$
$=\sqrt{300}$