| ⇦ | 
| ⇨ |
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: - If the minimum energy of photons needed to produce photoelectrons is 3 eV,
- Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
- A toroid having 200 turns carries a current of 1 A. The average radius of the toroid
- The number of photo electrons emitted for light of a frequency v
- In a vessel, the gas is at a pressure P. If the mass of all the molecules
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
- If the minimum energy of photons needed to produce photoelectrons is 3 eV,
- Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
- A toroid having 200 turns carries a current of 1 A. The average radius of the toroid
- The number of photo electrons emitted for light of a frequency v
- In a vessel, the gas is at a pressure P. If the mass of all the molecules
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
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply