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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
- If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
- The energy released by the fission of one uranium atom is 200 MeV.
- An electric motor operating on a 60 volt D.C supply draws a current of 10 amp.
- The resistance of a carbon resistor of colour code Red-Red Green Silver is(in kΩ)
- The focal length of the objective of a terrestrial telescope is 80 cm
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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