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Alinara [238K]
3 years ago
5

A 20 kg weight is suspended from a string. What is the tension on the string

Physics
2 answers:
erik [133]3 years ago
7 0

The weight is in equilibrium, so the two forces acting on it (tension <em>T</em> pulling upward, and its own weight <em>W</em> pulling it downward) cancel each other. By Newton's second law,

∑ <em>F</em> = <em>T</em> - <em>W</em> = 0

so that

<em>T</em> = <em>W</em>

Calculate the object's weight:

<em>W</em> = (20 kg) (9.8 m/s²) = 196 N

So the tension is <em>T</em> = 196 N as well.

JulsSmile [24]3 years ago
3 0

assume that tension in string a is Ta and in string b is Tb

now taking the component of tensions

Tasin30∘=Tbsin30∘...(1)

it means Ta=Tb

Tacos30∘+Tbcos30∘=mg...(2)

⇒2Tacos30∘=20×10⇒Ta=Tb=3200

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