Question

There is a graph of position (m) over time (s). It starts at (0,0), goes up to (2,4) then down to (3,-2).
What is the displacement at 3
s?
Answer in units of m Your answer must be
within ± 5.0%

Answer 1

"displacement at 3" -- What does that mean?

1: (0,0)
2: (2,4)
3: (3,-2)

Is that what "3" means?

You could just ignore 2 and use the distance formula do calculate the final displacement.

Answer 2

\(\large \text{distance between 2 points}\\
d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}\)

Answer 3

yes, the displacement at 3 seconds. but i don't know what it means to answer it within ± 5.0% ?

Answer 4

hmmm... yeah.... that's kinda obscure

Answer 5

So, what's the big deal? Answer it exactly.