Question

A particle is travelling in a circle of diameter 15m .calculate the distance covered and displacement when it complete two rounds

Answer 1

Hi.

Here is the answer----

_________________

Given ⇒
Diameter of the Circular Path = 15 m.

We know, Circumference of the Circular path will be the Distance covered by the Body in one Round.

Thus,Circumference of the  Circular Path =  2× $\pi$ r
                                                                  = 330/7 m

In second Round total Distance covered = 2 × 330/7
                                                                  = 660/7

Thus, Distance is 660/7 m during two rounds.


Displacement =0
Reason ⇒ Body returns to the same point after the second Round, thus displacement will be zero.

Answer 2

Diameter of Circle = 15m

Radius of Circle = 7.5m

Circumference of Circle=

2Πr

2×22/7×7.5

44/7×7.5

330/7=47.14m

Distance travelled in second round=

47.14×2

94.28m

Displacement=0