Question

For this velocity-time graph attached inside, in which time interval is the object moving toward the reference point?

A. 0-6 s

B. 6-7 s

C. 7-11 s

D. 11-20 s

What do you think? Thank you!!

Answer 1

graph!

Answer 2

We're moving `toward` the reference point when the `velocity is positive`, yes?
Positive velocity means we're moving forward.

So where do you see a positive output (y value)?
Looks like we have a constant positive velocity between 0 and 6 seconds.
Where else?

Answer 3

Okay, yes :)

so another one at 11-20 s ?

Answer 4

where the velocity is positive?

Answer 5

Mmm good good!

Answer 6

yay!

so are there more steps to complete?

Answer 7

Just practice a little bit reading these weird graphs.
Notice that from time 6 to 7, the object is moving backwards (away from the reference),
and from 7 to 11, the object is not moving.

No, we're done ^^

Answer 8

ohh so the answer would be 11-20 s ?

Answer 9

Hmm it should be both A and D
:o
You can only select one though?

Answer 10

yes, i can only choose one :/

Answer 11

Mmm that's weird :c

Answer 12

yeah :(

so which would you recommend to choose? :/ because they both apply right? :O

Answer 13

I will ask my teacher tomorrow about this since they both seem to apply!! :) Thanks @zepdrix :D

Answer 14

I don't know where the `reference point` is located.
I'm assuming it in front of our object.

If it was BEHIND, then the only time we would be moving toward it, would be when we're moving backwards, which would be from 6 to 7.

There isn't enough information about where the reference point is located.
Yah ask the teacher about that :d weird stuff.

Answer 15

yeah :/

thank you!!