A circular test track for cars has a circumference of 2.7km . A car travels around the track from the southernmost point to the northernmost point. What distance does the car travel? (answer 1.35km). Part B !!!!!!!What is the car's displacement from its original position?

Question

anonymous · Answer

It means it traveled distance equal to semicircle of the circle...

anonymous · Answer

displacement will be along the diameter of the circle.

anonymous · Answer

see the circumference of circle is given by $$2\pi r$$
and thus distance travelled is semicircle so $$2\pi r=2.7$$
$$\pi r=2.7/2=1.35km$$

anonymous · Answer

Yah I got the first part. Which was 1.35km but the displacement is asking for the same thing?

anonymous · Answer

Not sure what you are trying to explain.

anonymous · Answer

ok so as i said displacement is shortest path travelled. In case of circle  what os shoretest path traveled from soth point to the northpoint? It's diameter right.|dw:1410145681595:dw|
@f_s32

anonymous · Answer

just you need to calculate diameter of the circle :)