To be honest, I thought the med phys was harder than in recent years. It was still manageable, but we might all get a bit worked over on that ultrasound one.
You're answering your own question. Total velocity is the combination of horizontal and vertical velocity. Even though horizontal is constant, vertical is always changing, therefore velocity as a whole is changing.
I was just playing around with my marks on it, and I noticed something that whoever made SAM might want to change.
I am a strange person who accelerated 2 unit maths in year 11, and am now doing extension 1 and 2 in year 12. When i put in the mark i get this year, and my imagined marks for...