Q. A body projected horizontally with a velocity ‘v’ from a height ‘h’ has a range ‘R’. With what velocity a body is to be projected horizontally from a height h/2 to have the same range?
(a) √2v
(b) 2v
(c) 6v
(d) 8v
Click to See Answer :
Ans: (a)
$ \displaystyle v_1 t_1 = v_2 t_2 $
$ \displaystyle v \sqrt{\frac{2h}{g}} = v_2 \sqrt{\frac{2h}{2g}}$