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A stone is thrown in a …

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A stone is thrown in a vertically upward direction with a velocity of 5 m s-2. If the acceleration of the stone during its motion l0 m s-2 in the downward direction, what will be the height attained by the store and and how much time will it task to reach there

Posted by Mardav Jain 4 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

<div>Given, initial velocity, u=5ms−1</div> <div>Final velocity, v=0</div> <div>Since, u is upward & a is downward, it is a retarded motion. </div> <div>∴a=−10ms−2</div> <div>Height attained by stone, s=?</div> <div>Time take to attain height, t=?</div> <div>(i) Using the relation, v2−u2=2as, we have</div> <div>s=v2−u2/2a</div> <div>=(0)2−(5)2/2×(−10)=1.25m</div> <div>(ii) Using the relation, v=u+at</div> <div>0=5+(−10)t or</div> <div>t=5/10=0.5s</div>

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