What is the tension in the string?

[cgarr017]

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?

 

[Topher925]

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.

 

[alphysicist]

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?