You are holding a cup of hot tea. As you begin walking the tea spills out over the rim of the cup. Why?

the tea spilled because of air resistance.

if you had traveled faster this wouldn't have happened.

the cup and the tea act as one body with the same velocity.

the tea wanted to stay where it was, but you moved the cup.

one answer

could be that you may have tilted the cup too much as you were walking, causing the tea to spill over.