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Nina [5.8K]
2 years ago
8

What variable does each of the symbols in the equation represent?

Physics
1 answer:
taurus [48]2 years ago
4 0

Answer:

Pls give the equation and for what is that equation for?

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A heavy ball with a weight of 100 NN is hung from the ceiling of a lecture hall on a 4.4-mm-long rope. The ball is pulled to one
allochka39001 [22]

Answer:

175.3 N

Explanation:

The motion of the ball is a uniform circular motion, therefore the net force on it must be equal to the centripetal force.

There are two forces acting on the ball at the lowest point of motion:

- The tension in the string, T , upward

- The weight of the ball, mg, downward

The net force (centripetal force) has the same direction as the tension (upward, towards the centre of the circular path), so we can write:

T-mg=m\frac{v^2}{r}

where the term on the right is the expression for the centripetal force, and where:

T is the tension in the string

mg=100 N is the weight of the ball

m=\frac{mg}{g}=\frac{100}{9.8}=10.2 kg is the mass of the ball

v = 5.7 m/s is the speed of the ball at the lowest point

r = 4.4 m is the length of the rope, so the radius of the circle

Solving for T, we find the tension in the string:

T=mg+m\frac{v^2}{r}=(100)+(10.2)\frac{5.7^2}{4.4}=175.3 N

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3 years ago
Which two conditions would result in the weakest electric force between objects?
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The objects are far apart the weakest the result the two conditions
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What is the maximum current value that can be measured with an analog VOM? A. 5 A B. 20 A C. 10 A D. 15 A
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Answer is b to ur question
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Explanation:

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(D)

to establish an understanding of key concepts relating to population biology

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