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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: - A short linear object of length L lies on the axis of a spherical mirror of focal
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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
- A short linear object of length L lies on the axis of a spherical mirror of focal
- A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- As a light wave travels from one medium to another which of its following properties
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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