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4 years ago

A string is stretched by two equal but opposite forces f newton each what is tension in string

1 answer:

8 0

There is actually no force of tension in the string as the strings holds two forces acting on the same direction. It is zero.

Explanation:

If there was a tension in the string the two opposing forces with two equal magnitude will be pulling in the opposite directions.

When the f newton of the right is pulled one side and the f newton of the left is pulled the other side, there would be only one action by the force. Since there is one action in the same string in the opposite directions the tension can only be the magnitude of the string.

Indeed, there is actually no force of tension in the string as the strings holds two forces acting on the same direction. It is zero.

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Two long, parallel wires are separated by 2.0 m. Each wire has a 28-A current, but the currents are in opposite directions. Part

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Given Information:

Current = I = 28 A

distance between wires = r = 2.0 m

Required Information:

Magnetic field = B = ?

Answer:

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Step-by-step explanation:

Biot-Savart Law is given by

B = μ₀I/2πr

Where μ₀ is the permeability of free space, I is the current flowing through the wire and B is the magnitude of the magnetic field produced.

We are asked to find the magnetic field midway between the wires so r/2 = 1

B = 4πx10⁻⁷*28/2π*1

B = 6x10⁻⁶ T

since the same amount of current flows in both wires therefore, equal amount of magnetic field will be produced in both wires

B = 2*6x10⁻⁶ T

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Therefore, the net magnetic field midway between the two wires is 12x10⁻⁶ T.

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3 years ago

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A soccer player icks a rock horizontally off a 40m high cliff into a pool f water if the player hears the sound of the splash s

Semenov [28]

Answer:

v = 9.936 m/s

Explanation:

given,

height of cliff = 40 m

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assuming that time to reach the sound to the player = 3 s

now,

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$t = \sqrt{\dfrac{2s}{g}}$

$t = \sqrt{\dfrac{2\times 40}{9.8}}$

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distance

d = v x t

d = v x 2.875

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$t_0 = t - t_{fall}$

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we know.

d² + h² = r²

d² + 40² = 49.05²

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Explanation:

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