Originally Posted by codeblue:
“
A friend of mine actually got "jerk" for 5 points, but i was nowhere near that answer at all. I didn't even understand the validity of the maths equation to it - super vague!
Can someone explain why that equation means "jerk"?”
From physics.
It's the third derivative of position.
The first derivative of position is known as velocity, or the rate of change of position.
The second derivative of position is known as acceleration, the rate of change of velocity.
The third derivative of position is known as jerk (or jolt) and is the rate of change of acceleration.
The equation shown was the first derivative of acceleration da/dt.
It's called jerk because it's the rate of change of acceleration that causes you to be thrown about, if you have constant velocity or constant acceleration it feels a lot more comfortable, but when you change the acceleration you get thrown about - it's what rollercoaster designers rely on a lot.