| ⇦ | 
| ⇨ |
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: - The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹.
- A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
- The mean radius of the earth is R, its angular speed on its own axis is ?
- An air core solenoid has 1000 turns and is one meter long. Its cross sectional area
- Two charged particles have charges and masses in the ratio 2:3 and 1:4 respectively.
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹.
- A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
- The mean radius of the earth is R, its angular speed on its own axis is ?
- An air core solenoid has 1000 turns and is one meter long. Its cross sectional area
- Two charged particles have charges and masses in the ratio 2:3 and 1:4 respectively.
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