| ⇦ | 
| ⇨ |
The friction of the air causes a vertical retardation equal to 10% of the acceleration due to gravity (take g=10 ms⁻²). The maximum height will be decreased by
Options
(a) 8%
(b) 9%
(c) 10%
(d) 11%
Correct Answer:
9%
Explanation:
Retardation due to friction of air = 8/10. Hence, in upward motion
Total retardation = g + (8/10) = 11g / 10
.·. H(m) = u² sin² θ / 2g
H(m)’ = u² sin² θ / 2×(11g/10) = (10/11)×(u² sin² θ / 2g) = (10/11) H(m)
.·. % decreases in H(m) = {[H(m) – H(m)’] / H(m)} × 100
= [1 – (10/11)] × 100 = 9%
Related Questions: - An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor
- One mole of an ideal gas at an initial temperature of T K, does 6R joule of work
- Which of the following is or the property of a cathode ray
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor
- One mole of an ideal gas at an initial temperature of T K, does 6R joule of work
- Which of the following is or the property of a cathode ray
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
Topics: Motion in Straight Line (93)
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