It could well have been 2t^2 - 6 (the displacement function). But after substituting and subtracting, the 6s cancel. Which is the reason you don't need a constant in the definite integral.i was wondering where they got 2t2 in the bracket while integrating.
I have another question on distance. if anyone could help me.
what is the total distance travelled by x = 2sint-t from pi to zero. (using the second method).
and total distance travelled by the velocity curve 2-t from t1 to 2, and from 2 to t2 (answer is in terms of t1 and t2).
The the second question my only problem is setting out and not so much integrating and plugging in values.
anyone care to explain??