Question

Question #8ce1c

Answer 1

see the explanation zone please

Explanation:

Going half the circle means new position is just to the diametrically opposite point to that of the initial point.

So,displacement = diameter of the circle = 2* radius =`(2*3.70)Km` or `7.4 Km` or, `740 m`

Now, average velocity = total displacement/total time = `(740/170) m/s` or, `4.35 m/s`

Now, distance covered in this time = half the perimeter of the circle i.e `pi*r` or, `11.62 Km` or, `11620 m`

So, average speed = total distance covered/total time = `(11620/170) m/s` i.e `68.35 m/s`