Question

Assertion :When a body is dropped or thrown horizontally from the same height, it would reach the ground at the same time. Reason: Horizontal velocity has no effect on the vertical direction

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

For both the cases, the vertical component of the velocity is zero i.e $u_y=0$

Using $S_y=u_{y}t+\frac{1}{2}{a}_y{t}^2$

$\therefore$ $h=0+\frac{g{t}^2}{2}$ $⟹t=\sqrt{\frac{2h}{g}}$

Hence the body will reach the ground at the same time.

Also from the equation used, the horizontal velocity has no effect on the vertical direction.

Thus option A is correct.