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Keith_Richards [23]

3 years ago

6

The vertical normal stress increase caused by a point load of 10 kN acting on the ground surface at a point 1m vertically below

its point of application is: (a) 0 (b) 4.775 kN (c) 5 kN (d) 10 kN

1 answer:

Tomtit [17]3 years ago

8 0

Answer:

(b) 4.775 kN

Explanation:

see the attached file

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Explanation:

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Radius of outer shell = 14.0 cm

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Charge on outer shell $q_{out}=1.60\times10^{-8}\ C$

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Using formula of electric field

$E=\dfrac{kq}{r^2}$

Put the value into the formula

$E=\dfrac{9\times10^{9}\times5.1\times10^{-8}}{(20.5\times10^{-2})^2}$

$E=1.09\times10^{4}\ N/C$

Hence, The magnitude of the electric field are $2.38\times10^{4}\ N/C$ and $1.09\times10^{4}\ N/C$

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