⇦ | ⇨ |
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: - When the disc rotates with uniform angulr velocity.Which of the following is not true?
- The work function of a substance is 4.0 eV. The longest wavelength of light
- The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
- A solid sphere of mass M, radius R and having moment of inertia about an axis passing
- Dimensional formula for electrical resistance R is given by
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When the disc rotates with uniform angulr velocity.Which of the following is not true?
- The work function of a substance is 4.0 eV. The longest wavelength of light
- The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
- A solid sphere of mass M, radius R and having moment of inertia about an axis passing
- Dimensional formula for electrical resistance R is given by
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