Question

Find the horizontal velocity of the particle when it reach the point Q. Assume the block to the frictionless. Take $g=9.8m/s^2$.

• A. $v=3.13\frac{m}{s}$
  
• B. $5$ m/s
• C. $\sqrt{g}$ m/s
• D. $3.6$ m/s

Answer 1

The correct option is A $v=3.13\frac{m}{s}$

$mgh=0.5\times m\times v^2$

$2gh=v^2$

Therefore\quad $v=3.13\frac{m}{s}$