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3 years ago

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A street lamp weighs 150N. It is supported by two wires that form an angle of 120° with each other. The tensions in each wire ar

e equal. What is the tension in each wire?

1 answer:

____ [38]3 years ago

4 0

Answer:

60

so you take 120÷2 wires

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Convert 75.0 degrees Fahrenheit into Celsius

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Answer:

23.889 Celcius

Explanation:

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A stone is dropped from a tower 100 meters above the ground. The stone falls past ground level and into a well. It hits the wate

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Make the base of the building zero. Then the initial distance is 100m, final distance unknown x. Use gravity, time and initial velocity to solve for final distance.
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x - 100 = 0 - 122.625
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Holding onto a tow rope moving parallel to a frictionless ski slope, a 70.1 kg skier is pulled up the slope, which is at an angl

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Answer:

given,

mass of the skier = 70.1 Kg

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a) Applying newton's second law

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$F_{rope} = m g sin\theta$

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b) now, when acceleration, a = 0.135 m/s²

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$F_{rope} = m g sin\theta+ma$

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3 years ago

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True: All matter on earth is made up of atoms.

False: Subatomic particles don't identify an element. I give you an electron. Can you tell me where it came from?

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3 years ago

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While standing at the edge of the roof of a building, a man throws a stone upward with an initial speed of 6.95 6.95 m/s. The st

qwelly [4]

Answer:

18.1347 m/s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

g = Acceleration due to gravity = 9.81 m/s² = a

$v^2-u^2=2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{0^2-6.95^2}{2\times -9.81}\\\Rightarrow s=2.4619\ m$

Total height the ball falls is 2.4619+14.3 = 16.7619 m

$v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 16.7619+0^2}\\\Rightarrow v=18.1347\ m/s$

The speed at which the stone reaches the ground is 18.1347 m/s

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3 years ago