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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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- A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
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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
- The ‘rad’ is the correct unit used to report the measurement of
- A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
- The identical cells connected in series are needed to heat a wire of length one meter
- Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C
- A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
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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