Physics · 2009
NEET 2009 · Prelims · Code A · Q13
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What…
An engine pumps water continuously through a hose. Water leaves the hose with a velocity $\displaystyle v$ and $\displaystyle m$ is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water ?
Official answer
(2)
$\displaystyle \frac{1}{2} m v^3$
More from Work, Energy and Power
- Water falls from a height of 60 m at the rate of 15 kg / s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much…2008
- A bob of heavy mass m is suspended by a light string of length l. The bob is given a horizontal velocity v_0 as shown in figure. If the string gets…2025
- A ball is thrown vertically downwards from a height of 20 m with an initial velocity v_0. It collides with the ground, loses 50 percent of its energy…2015
- A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The…2021
- A mass m moving horizontally (along the x-axis) with velocity v collides and sticks to a mass of 3m moving vertically upward (along the y-axis) with…2011
- The potential energy of a particle in a force field is: U=A/(r^2)-B/r, where A and B are positive constants and r is the distance of particle from…2012
- A bullet from a gun is fired on a rectangular wooden block with velocity u. When bullet travels 24 cm through the block along its length…2023
- An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m / s. The mass per unit length of water…2010
NEET (UG) 2009 Physics question, with the answer from NTA’s final answer key. Where our answers come from.