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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 velocity of molecules of a gas at temperature 120 K is v. At what temperature
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- A glass slab consists of thin uniform layers of progressively decreasing refractive
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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 velocity of molecules of a gas at temperature 120 K is v. At what temperature
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- A glass slab consists of thin uniform layers of progressively decreasing refractive
- When a metallic surface is illuminated with radiation of wavelength λ,
- The kinetic energy of α-particle emitted in the α-dacay of ₈₈Ra²²⁶ 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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