Question

Water falls $19.6m$, the velocity of water is

• A. $9.8m{s}^{-1}$
• B. $19.6m{s}^{-1}$
• C. $39.2m{s}^{-1}$
• D. $98m{s}^{-1}$

Answer 1

Answer: (B)

Using, $\sqrt{2gh}=\upsilon$, we get $\upsilon =(2\times 9.8\times 19.6{)}^{1/2}=19.6m{s}^{-1}$