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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
- The magnetic flux linked with a circuit of resistance 100Ω increases from 10 to 60 Wb.
- Pure Si at 500 K has equal number of electron (nₑ) and hole (nₕ) concentrations
- Sodium and copper have work function 2.3 eV and 4.5 eV respectively
- In which of the processes, does the internal energy of the system remain constant?
- An electron of a stationary hydrogen atom passes from the fifth energy level to
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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