Inteligent Astronaut

Classical Mechanics Level 1

NASA desided to send an astronaut on a planet to research on it.While researching he got the order from his boss to find the value of acceleration due to gravity on that planet.But suddenly he realized that he don't have nassassery instruments to do so so he used an ulternate mathod. He took a stone and allowed it to fall freely from a hight of 45m under the gravitational pull of that planet.If time taken by the stone to reach the serface of that planet was 3s, find out the acceleration due to gravity at that planet


The answer is 10.

Aman Sharma by Aman Sharma , 25, India

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4 solutions

t = 2 h g t=\sqrt{\frac{2h}{g}}

3 = 2.45 g 3=\sqrt{\frac{2.45}{g}}

9 = 90 g 9=\frac{90}{g}

g = 10 m / s 2 g=10m/s^2

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Vishesh Bansal
Jun 10, 2015

Many spellings are wrong :p

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Abhi Shek
Aug 21, 2014

s=ut+ 1/2 at^2,

u=0 :D

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Is it earth??

shivamani patil - 6 years, 9 months ago

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No he is on mars :p

Aman Sharma - 6 years, 9 months ago

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Nope not on mars he would be on Venus mars has acceleration due to gravity 3.2....

Kushal Patankar - 6 years, 4 months ago
Kamal Der
Aug 11, 2014

d= 1/2 gt²

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