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Description: A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take thestone to reach the water?

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A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take the stone to reach the water

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter14: Fluid Mechanics

Section: Chapter Questions

Problem 23CQ: Water is shot nearly vertically upward in a decorative fountain and the steam observed to broaden as...

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Question

A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take the
stone to reach the water?

Expert Solution

Step 1

Distance traveled by stone,(s)=30 m -----(1) [Given]

The initial speed of the stone,(u)=0 m/sec -----(2) [Given] [Stone initially at rest]

Acceleration due to gravity,(g)=9.81 m/sec² -----(3) [Given]

Suppose time taken (t) by the stone to reach the water in seconds respectively.

Using 2^nd equation of kinematics we get,

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