| ⇦ | 
| ⇨ |
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: - Two charged spheres seperated at a distance d exert a force F on each other.
- A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas
- A transistor is operated in common-emitter configuration at Vᵥ = 2 V such that a change
- Two satellites of earth, S₁ and S₂ are moving in the same orbit. The mass of S₁
- In a semiconductor
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two charged spheres seperated at a distance d exert a force F on each other.
- A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas
- A transistor is operated in common-emitter configuration at Vᵥ = 2 V such that a change
- Two satellites of earth, S₁ and S₂ are moving in the same orbit. The mass of S₁
- In a semiconductor
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