Q. A cyclist moves in such a way that he track $60{^\circ}$ turn after 100 m. What is the displacement when to takes seventh turn?
A) 100 m
B) 200 m
C) $100\sqrt{3}$ m
D) $100\sqrt{3}$ m
Explanation
(a) In 6 turns each of $60{^\circ}$, the cyclist traversed a regular hexagon path having each side 100 m. So, at 7th turn, he will be again at
[image:4_image137.emf]
Point B (as shown) which is at distance 100 m from starting point A. Hence, net displacement of cyclist is 100 m.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.