Is there a weight limit for your carry-on bag for a Jet-Blue national flight?

Question

I'm moving to Boston this August for school, and am taking the majority of my personal belongings with me. My parents are both flying there to help me move-in, and will both be packing all of their essential items in their carry-on bag, so that I may utilize their 1 free checked bag each. Because I'm a musical theater student, I have a lot of plays, sheet music, and books to take with me to school. Because I could not find any provisions on the website regarding weight for carry-on baggage, I had intended on packing my books in my carry-on (within reason). I wanted to make sure there were no limitations regarding weight for carry-on that I somehow missed. We will be flying Jet Blue from LA to Boston. THANKS FOR YOUR HELP!!! :)

Answer 1

when I went from  NY to FL the weight limit was 50 lbs per bag. Good luck in school hope you have fun!  

oh and I also used Jet blue.  

Answer 2

Some airlines post a weight limit for carry ons, but most don't.  The limit will most likely be for size, not weight.