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A boy standing at top of a tower of 20 m height drops a stone.assuming g=10 ms⁻²,the velocity with which it hits the ground is
Options
(a) 20 m/s
(b) 40 m/s
(c) 5 m/s
(d) 10 m/s
Correct Answer:
20 m/s
Explanation:
Let, v²=u²+2gh
v= is the final velocity
u= is the initial velocity
g= is the acceleration
h= is the distance
Then, u =0
.·. v²=0²+2gh
v=√2gh
Given, g=10 m/s², h=20 m
.·. v=√2x10x20
v=20 m.
Related Questions: - The horizontal range and the maximum height of a projectile are equal
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A beam of light consisting of red, green and blue colours is incident on a right
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Difficulty Level: Easy
(1008)
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The horizontal range and the maximum height of a projectile are equal
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A beam of light consisting of red, green and blue colours is incident on a right
- Which one of the following statements is WRONG in the context of X-rays generated
- The order of radius of the nucleus of an atom is
Difficulty Level: Easy (1008)
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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