If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbines, is (Take g = 9.8 m/s2)

Question

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbines, is (Take g = 9.8 m/s2) (A) 9.8 m/s (B) 19.6 m/s (C) 39.2 m/s (D) 98.0 m/s

Tardigrade Admin · Accepted Answer

As the water falls freely from a height 19.6 m, so the velocity of water at the turbine is v=√2gh=√2×9.8×19.6 =19.6 m/s

Q. If the water falls from a dam into a turbine wheel $19.6 m$ below, then the velocity of water at the turbines, is (Take $g = 9.8 m / s^{2}$ )

9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

As the water falls freely from a height $19.6 m$ , so the velocity of water at the turbine is
$v = 2 g h = 2 \times 9.8 \times 19.6$
$= 19.6 m / s$

Q. If the water falls from a dam into a turbine wheel 19.6m below, then the velocity of water at the turbines, is (Take g=9.8m/s2)