First slide

Power

Question

An engine pumps water continuously through a hose Water leaves the hose with a velocity 'v' and 'm' mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water

Moderate

A

$\frac{1}{2} m^{2} v^{2}$
B

$\frac{1}{2} m v^{3}$
C

$m v^{3}$
D

$\frac{1}{2} m v^{2}$

Solution

Length of water jet leaving the hose in unit time = v
Man of water leaving the hose in unit time = mv.
Kinetic energy leaving the hose per unit time
$\frac{1}{2} (m v) v^{2}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App