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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: - In the series resonance the value of impedence is 3 Ω and the resistance is 4Ω,
- 4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas
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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
- In the series resonance the value of impedence is 3 Ω and the resistance is 4Ω,
- 4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas
- A thin film of soap solution (n=1.4) lies on the top of a glass plate (n=1.5).
- A particle is moving such that its position coordinates (x,y) are (2 m,3 m) at time
- An air core coil and an electric bulb are connected in series with an AC source.
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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