Calculate the tension of the blocks

[allora_97]

Homework Statement

Four blocks are on a frictionless horizontal
surface. The blocks are connected by massless
strings with tensions Ta, Tb, and Tc.
Calculate the tension Tc.
Answer in units of N.

Homework Equations

F = ma
Fn = mg

The Attempt at a Solution

Tc1 = 25N
Tc2 = 35N

 

[tiny-tim]

Hi allora_97!

Tc1 = 25N
Tc2 = 35N

No.

Hint: what is the acceleration?