Hello!
The answer is: Both scales will measure a weight 10 lb
Why?
From the options, we can know that both spring scales are in series:
It's like there are just one scale composed by two scales since the statement states that both has negligible weight, so both scales will be reading the whole weight.
Calculations:
[tex]T1=T2[/tex]
[tex]Force = Tension - Weight = ma\\Tension - Weight = 0\\Tension = Weight[/tex]
So, if tension is equal to weight, it means that both scales will be reading a weight of 10 lb.
Have a nice day!
