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A boy standing at the top of a tower of 20m height drops a stone. Assuming g = 10 ms⁻², the velocity with which it hits the ground is
Options
(a) 10 m/s
(b) 20 m/s
(c) 40 m/s
(d) 5 m/s
Correct Answer:
20 m/s
Explanation:
Here, u= 0 We have, v² = u² + 2gh
v = √(2gh) ⇒ √(2 x 10 x20)
= 20 m/s
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Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Mass and diameter of a ring is 2 kg and 1 m respectively. The moment of inertia
- The electric potential at the surface of an atomic nucleus (z=50) of radius
- A particle executes simple harmonic oscillations with an amplitude
- The resultant of two forces, one double the other in magnitude, is perpendicular
- A galvanometer of 50 Ω resistance has 25 divisions. A current of 4×10⁻⁴ A gives
Topics: Motion in Straight Line (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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