The error involved for each case and asses the accuracy of strokes law.

Answer to Problem 110P
In first ball
In second ball
In third ball
Explanation of Solution
Given information:
The diameter of the first aluminum ball is
Write the expression of drag force acting on the freely falling body.
Here, the weight of the ball is
Write the expression of drag force by strokes law.
Here, the terminal velocity is
Write the expression of the weight of the body.
Here, the density of the ball is
Write the expression of bouncy force applied by a body.
Here, the density of the fluid is
Substitute
Write the expression of volume of the ball.
Write the expression of percentage error.
Here, the given terminal velocity is
Calculation:
For First ball,
Substitute
Substitute
Taking positive sign.
Taking Negative sign.
Here, the negative value of velocity is not desirable so the velocity is
Substitute
In first ball
For Second ball,
Substitute
Substitute
Taking positive sign.
Taking Negative sign.
Here, the negative value of velocity is not desirable so the velocity is
Substitute
In second ball
For Third ball.
Substitute
Substitute
Taking positive sign.
Taking Negative sign.
Here, the negative value of velocity is not desirable so the velocity is
Substitute
In third ball
Conclusion:
In first ball
In second ball
In third ball
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Chapter 11 Solutions
FLUID MECHANICS FUND. (LL)-W/ACCESS
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