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to find the velocity

Asked by 12th September 2013, 7:25 PM
Answered by Expert
Answer:
u = 0, t = 4 s, g = 9.8 m/s2.
 
We know that,
Thus, the depth of well is
 
We also know that,
 
Thus, the velocity with which the stone hits the well surface is
Answered by Expert 13th September 2013, 10:13 AM
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