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CBSE Class 9 Answered

kinematics
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Asked by palagarapapamma1982 | 26 Sep, 2023, 08:50: PM
answered-by-expert Expert Answer
Given that,
Speed of stone in vertically upward direction, u = 10 m/s
Height of cliff = 65 m
Now, by applying law of conservation of energy.
Total Energy at top possition = Total Energy bottom position.
Thus.
m g left parenthesis 65 right parenthesis plus 1 half m space left parenthesis 10 right parenthesis squared equals 0 plus 1 half m v squared v squared equals space 100 space plus 2 cross times 10 cross times 65 space equals 1400 v space equals square root of 1400 equals 37.41
Answered by Jayesh Sah | 27 Sep, 2023, 12:12: PM

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