Question

A bullet is dropped from the same height when another bullet is fired horizontally. They will hit the ground

• A. one after the other
• B. simultaneously
• C. depends on the observer
• D. none of these

Answer 1

The correct option is B simultaneously

Time taken to reach the ground depends on the vertical component of velocity, not horizontal component of velocity. $u_y=0$

$s=u_{y}t+\frac{1}{2}g{t}^2=\frac{1}{2}g{t}^2$

$\Rightarrow t=\sqrt{\frac{2s}{g}}$

Since $s_1=s_2$ therefore $t_1=t_2$