All kids have trouble with this at some time or another, no matter what age, or how old they are.
My girl is also 5 years old, and she does this too sometimes. Many times she just wants company... and at this age, you do need to sit with them and help them study or do homework... no child, this age, is just able or mature enough to sit themselves down, and do their homework by themselves. They need parental involvement to do homework. Not saying you aren't, but... many times we just expect kids to do what we want... but "forget" that they are just so young and need us if even for company while they do their "chores."
My girl has even told me once in awhile, (when I am telling her to do something)- "Mommy, I'm just a little girl... please help me, don't rush me..." THIS is a real eye opener to reminding ME of how we go about our day, and the times when I just merely "tell" my girl what to do, especially when I am on "auto-pilot" and not thinking things out deeply enough because I am the one rushing around.
No matter what.. by this age, a child can certainly talk about how they feel, what they need. A child has a voice, and as a Parent, I try to make it a point to "listen" to my girl and validate any feelings she has or why she needs help. It really makes her feel better, and more prone to doing her "chores." It helps us to bond too... because then she "knows" that I am listening to her while trying to have her do her "responsibilities" at the same time.
For a child at this age, they have a lot on their plate too... and their responsibilities, with school and at home, are increased too. Sometimes they balk at doing them... because children can also feel overwhelmed with everything. Sometimes, they just cannot be expected to do everything as we wish. When they balk.. this is their way of telling us they are feeling stressed, or tired, or overwhelmed, or they may not know how to do something, or simply need a break to unwind etc. At least this is what I have learned from my daughter.
Many times, instead of just telling my girl what to do... I make it like we are a "team" and that she is "helping" Mommy...this makes it more appealing to her as well.. .and then she is more prone to cooperate, as then she feels she is doing something "together" with me.
All their lives, kids will need to learn to do things, even if they don't want to. But, with my girl we make it a point to just talk story and then weave "lessons" into the dialog as we go along... and that way, she "learns" too at the same time, without us having to "nag" her about things. It makes communicating together more fun too. We also encourage our girl to "do your best" versus, having to do things "perfectly"... so as to encourage them and make it fun and more attainable. My daughter's teacher also emphasizes this as well.. so that they don't get "burnt out" on the idea of learning or working hard....
Well just some ideas and what I experienced with my girl. Good luck... if anything, you can talk to her teacher and see how she is performing in school... or if there are any problems.
All the best,
~Susan