3 years ago

How high is the average telephone pole

Physics

2 answers:

kenny6666 [7]3 years ago

7 0

The average telephone pole stands about 40ft in the air.

Ksivusya [100]3 years ago

7 0

Well the first dude isn't wrong it is 40ft....But it's taller than me

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What must the charge (sign and magnitude) of a particle of mass 1.41 gg be for it to remain stationary when placed in a downward

Yuri [45]

Answer:

$q = 2.067 \times 10^{-5}\ C$

Explanation:

Given,

mass = 1.41 g = 0.00141 Kg

Electric field,E = 670 N/C.

We know,

Force in charge due to Electric field.

F = E q

And also we know

F = m g

Equating both the equation of motion

m g = E q

$q =\dfrac{mg}{E}$

$q =\dfrac{0.00141 \times 9.81}{670}$

$q = 2.067 \times 10^{-5}\ C$

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4 years ago

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olasank [31]

Answer:

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Given that:

mass of cannonball $m_A$ = 72.0 kg

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the final velocity of the combined system v = ????

By applying the linear momentum of conservation:

$m_A \mu_{xA}+m_B \mu_{xB} = (m_A+m_B) v$

$72.0 \ kg \times 6.50 \ m/s+65.0 \ kg \times 0 = (72.0 \ kg+65.0 \ kg) v$

$468 kg m/s + 0 = (137 kg)v$

$v = \dfrac{468\ kg m/s }{137 \ kg}$

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Explanation:

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Sonja [21]

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3 years ago

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