What is the tension in the string?

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SUMMARY

The discussion centers on calculating the tension in a string connecting two blocks, A and B, subjected to external forces. Block A experiences a force of 15 N and has a mass of 5.0 kg, while block B is acted upon by a force of 24 N and has 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. The confusion arises from the incorrect application of the formula F=ma, specifically in determining the tension in the string and understanding the implications of differing accelerations between the blocks.

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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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