Is this child abuse what my mom does to me?

My mom pulls my hair if I do something wrong. She calls me a fuc&in idiot all the time. On the weekends when my friends are out to eat or doing something my mom makes me study the whole weekend.The only thing I do is study and nothing else I can't leave the house or anything. My mom once threw me and gave me a mark on my leg and I was wearing my favorite PJ's and they ripped. She gets really mad at me all the time if I get an 80 she will scream. Is this child abuse or not?