| ⇦ | 
| ⇨ |
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:
- If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
- A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance
- A ball is dropped into a well in which the water level is at a depth h below the top
- By sucking through a straw, a student can reduce the pressure of his lungs
- In photoelectric emission process from a metal of work function
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