Two blocks are pulled across a frictionless surface by a $240\ N$ force, as shown in the diagram below: $60\ kg$ - - - cord - - - $20\ kg$ → $240\ N$. If the blocks are accelerating at $3\ m/s^2$ what is the tension of the cord in between the two blocks? So I don't really have a strategic approach to this problem. I Isolate $20\ kg$ and see that $f = (20\ kg)(3\ m/s^2)$. Therefor it takes 60 newtons for that block to accelerate at $3\ m/s^2$ and the other 180 newtons are used to pull the second block and therefor $180\ N$ is the tension.
- Is that correct, my teacher never gives me the answer sheet :(
- Is there a step by step approach I can apply to tension questions?
Thanks a lot!