## need_help! 3 years ago If you go exactly twice round a field of perimeter 280m, what will your displacement be?

1. CliffSedge

Displacement is the difference between where you end up and where you start.

2. CliffSedge

If you go around the field exactly twice, how far are you from where you started?

3. need_help!

Yes, I know that :) But what was the first and last point you went to?

4. CliffSedge

Think about it (and draw a diagram!)

5. need_help!

Okay! I will try :D

6. CliffSedge

Physics takes some imagination. You should always help your imagination out by drawing a picture, but this one is easier than you think. (here's a hint: the perimeter of the field is irrelevant)

7. need_help!

8. CliffSedge

Yep. If you got exactly twice around something that's the same as going exactly once around - you'll end up in the exact same place you started from.

9. CliffSedge

And that's the same as not going anywhere at all!

10. need_help!

Which means zero :)) I can't believe I didn't know this one :P Thanksss!! :D

11. CliffSedge

Two primary tools for physics: math skills and common sense!

12. need_help!

Math skills= Calculator!! And common sense= I think I need to work on that a bit.

13. need_help!

14. need_help!

If you go exactly twice round a field of perimeter 340m, what is the distance you travel?

15. CliffSedge

You know the distinction between distance and displacement?

16. need_help!

Yes

17. CliffSedge

Then imagine if you did twice that perimeter in a straight line, how far did you go?

18. CliffSedge