Hello!!! I'm a 2nd year Artsci student at Mac and I'm so excited you're interested! It's a super lovely program! Many of the people in physics, which I'm taking right now, haven't ever taken it before; the course is set up to teach you from the ground up, so you should be okay on that front! As for calc, if you're taking some high school calc courses now, you should be great! The calc course is also set up to teach you fundamentals; there are some basics you should know, like trig for example, but it's perfectly doable. I hope this helps, and I hope you apply!!
Oh, and let me know if you have more questions!