| ⇦ | 
| ⇨ |
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: - A thermocouple is made from two metals, antimony and bismuth. If one junction
- The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
- The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
- In an ac circuit an alternating voltage e = 200 √2 sin 100 t volts is connected
- A motorcycle moving with a velocity 72 kmh⁻¹ on a flat road takes a turn
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thermocouple is made from two metals, antimony and bismuth. If one junction
- The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
- The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
- In an ac circuit an alternating voltage e = 200 √2 sin 100 t volts is connected
- A motorcycle moving with a velocity 72 kmh⁻¹ on a flat road takes a turn
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