| ⇦ | 
| ⇨ |
The momentum of a body is increased by 20%.The percentage increases in kinetic energy is
Options
(a) 54 %
(b) 44 %
(c) 100 %
(d) 50 %
Correct Answer:
44 %
Explanation:
Increase in KE = p²/2m
New momentum = p + p/5 = 6p/5
KE(f) = [(6/5).p]²/2m = (36/25).(p²/2m)
ΔKE = (36/25).(p²/2m) – (p²/2m) = (11p²/252m)
Percentage increase = 44%
Related Questions: - If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string
- A slab consists of two parallel layers of two different materials of same thickness
- The specific charge of a proton is 9.6×10⁷ C/kg. The specific charge of an alpha particle
- The wavelength of the first line of Lymasn series for hydrogen atom is equal
- The current in a conductor varies with time t as I=2t+3t² Where I is in amperes
Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string
- A slab consists of two parallel layers of two different materials of same thickness
- The specific charge of a proton is 9.6×10⁷ C/kg. The specific charge of an alpha particle
- The wavelength of the first line of Lymasn series for hydrogen atom is equal
- The current in a conductor varies with time t as I=2t+3t² Where I is in amperes
Question Type: Memory (964)
Difficulty Level: Easy (1008)
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