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lisabon 2012 [21]
4 years ago
5

Consider the following distinct forces:______________________________.

Physics
1 answer:
Kamila [148]4 years ago
5 0

Answer:

1 and 2

Explanation:

It is given that, force exerted by air is negligible in any way.

Also, it is given that channel is in the shape of a segment of a circle with its center at O.

When it is within the frictionless channel at position 'Q',

A gravity exerts force on the ball in the downward direction. On the other hand, the channel pointing from Q to O also exerts a force on the ball.

However, there is no any force in the direction of motion. On the other hand, he channel pointing from O to Q does not exert a force on the ball.

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3 years ago
A very long uniform line of charge has charge per unit length 4.54 μC/m and lies along the x-axis. A second long uniform line of
kozerog [31]

Answer:

The magnitude of the net electric field is 6.57\times10^{5}\ N/C

Explanation:

Given that,

Charge density \lambda = 4.54\ \mu C/m

Charge density \lambda' = -2.58\ \mu C/m

Distance y_{1}= 0.384\ m

Distance y_{2}= 0.204\ m

We need to calculate the magnitude of the net electric field

Using formula of electric field

E=E_{1}+E_{2}

E=\dfrac{1}{2\pi\epsilon_{0}}(\dfrac{\lambda}{r}+\dfrac{\lambda'}{r'})

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E=\dfrac{1}{2\pi\times8.85\times10^{-12}}(\dfrac{4.54\times10^{-6}}{0.204}+\dfrac{2.58\times10^{-6}}{0.384-0.204})

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Hence, The magnitude of the net electric field is 6.57\times10^{5}\ N/C

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