| ⇦ | 
| ⇨ |
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 of at which kinetic energy is imparted to water?
Options
(a) mv²
(b) 1/2 mv²
(c) 1/2 m²v²
(d) 1/2 mv³
Correct Answer:
1/2 mv³
Explanation:
m : mass per unit length
rate of mass leaving the the hose per sec
= mx / t = mv.
Rate of K.E. = 1/2 (mv)v² = 1/2 mv³
Related Questions: - Four blocks of same mass connected by cords are pulled by a force F
- Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line
- Consider the following two statements about Kirchhoff’s law
- The input resistance of a silicon transistor is 100 W. Base current is changed
- In R-L-C series circuit, the potential differences across each element is 20 V.
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Four blocks of same mass connected by cords are pulled by a force F
- Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line
- Consider the following two statements about Kirchhoff’s law
- The input resistance of a silicon transistor is 100 W. Base current is changed
- In R-L-C series circuit, the potential differences across each element is 20 V.
Topics: Work Energy and Power (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply