The hardest thing we do every day - waking up and getting out of bed.
Newton's first law states that things at rest are likely to stay at rest unless acted upon by an outside force. Whether that force is our alarm clock, angry parents, or the panic of sleeping in a few minutes too late, it can be hard to get moving. Most days it's better to just lay in bed and hope that your homework does itself.
However, Newton's law doesn't apply in the first few minutes after getting up - once you're in motion, it's very easy to go back to sleep. This is because of a phenomenon known as the "Sleepy Teenager Complex," caused by too much homework and not enough time to do all of it while still completing necessary functions.
To this day, a cure for Sleepy Teenager Complex continues to allude us.