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Lubov Fominskaja [6]
3 years ago
11

Plz help me answer this its 1 question will give brainliest

Physics
2 answers:
kolbaska11 [484]3 years ago
6 0
Circularity system........…….......
PIT_PIT [208]3 years ago
4 0

nerve cells; circulatory system; 5 hours

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The speed of a sound wave depends mostly on ?
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A 300 gg ball on a 70-cmcm-long string is swung in a vertical circle about a point 200 cmcm above the floor. The string suddenly
Ratling [72]

Answer:

the   tension in the string an instant before it broke = 34 N

Explanation:

Given that :

mass of the ball m = 300 g = 0.300 kg

length of the string r = 70 cm = 0.7 m

At highest point, law of conservation of energy can be expressed as :

\frac{1}{2} mv^2 = mgh\\\\v = \sqrt{2gh}\\\\v = \sqrt{2*(9.8 \  m/s^2)*(6.00 \ m - 2.00 \ m)}\\\\

v = 8.854 \ m/s

The tension in the string is:

T = \frac{mv^2}{r}\\\\T = \frac{(0.300 \ kg)*(8.854 \ m/s^2)}{0.70 \ m}\\\\T = 33.59 N\\\\T = 34 \ N

Thus, the   tension in the string an instant before it broke = 34 N

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if that's not the question being asked, i would need a little more elaboration please :)
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