What is the tension in the string?

AI Thread Summary
The discussion revolves around calculating the tension in a string connecting two blocks subjected to different forces. Block A experiences a force of 15 N and has a mass of 5.0 kg, while block B experiences a force of 24 N with a mass of 6.0 kg. The total force acting on the system is 39 N, leading to an acceleration of 3.54 m/s² when applying Newton's second law. A participant questions the inconsistency in acceleration between the two blocks, suggesting that if they had different accelerations, the string would either slack or break. Clarification is sought on the meaning of the force value calculated as 17.7 N, indicating confusion in the application of the equations.
cgarr017
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forces act on blocks A and B, which are connected by a string. Force FA = (15 N) i acts on block A, with mass 5.0 kg. Force FB = (24 N) i acts on block B, with mass 6.0 kg. What is the tension in the string?

Fa Fb
-> ->
[A]----->

F=ma
(15N+24N)=(5.0kg+6.0kg)(a)
39=11a
3.54=a

F=ma
F=5(3.54)
F=17.7 X wrong
what am i doing wrong?
 
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Why would there be a difference in acceleration between the two blocks? If that were the case the string would either have slack or break.
 
cgarr017 said:
forces act on blocks A and B, which are connected by a string. Force FA = (15 N) i acts on block A, with mass 5.0 kg. Force FB = (24 N) i acts on block B, with mass 6.0 kg. What is the tension in the string?

Fa Fb
-> ->
[A]----->

F=ma
(15N+24N)=(5.0kg+6.0kg)(a)
39=11a
3.54=a

F=ma
F=5(3.54)
F=17.7 X wrong
what am i doing wrong?


You found that F=17.7, but what does F in this equation stand for?
 

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