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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
Related Questions: - The moon’s radius is 1/ 4 that of the earth and its mass is 1 / 80 times that of the earth
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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 moon’s radius is 1/ 4 that of the earth and its mass is 1 / 80 times that of the earth
- A solid sphere, a hollow sphere and a ring are released from top of an inclined
- A beam of electron passes undeflected through mutually perpendicular
- In thermodynamics processes which of the following statements is not true?
- The momentum of a body is increased by 20%.The percentage increases in kinetic energy
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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