AIPMT MAINS2009Physics-Work, Energy and Power
AIPMT MAINS 2009 Physics Kinetic Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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 is the rate at which kinetic energy is imparted to water?
A
mv²
B
(1/2)mv²
C
(1/2)m v²
D
(1/2)mv³
Correct Answer
Option D
Detailed Explanation
The rate of kinetic energy imparted is given by (1/2)mv², where m is the mass flow rate and v is the velocity. Here, the correct formula is (1/2)mv³ as it considers the mass per unit length.
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