Question

A particle is moving in circle of diameter 5m. Calculate the distance covered and displacement when it completes three revolution

Answer 1

$\bold{Given : }$

A particle is moving in circle of diameter 5m.

$\bold{To \: be \: calculated : }$

Calculate the distance covered and displacement when it completes three revolution.

$\bold{Formula \: used : }$

⋆ Circumference of circle = 2πr

$\bold{Solution : }$

We have,

Diameter of circle = 5 m

Radius of circle = d/2 = 5/2 = 2.5 m

Now,

Distance covered when it complete one revolution = 2πr

→ 2 × 22/7 × 2.5

→ 44/7 × 25/10

→ 1100/70

→ 15.71

Distance covered when it complete three revolution

= 3 × 15.71

= 47.13 m

Displacement is zero because the straight line distance between the initial and final position is zero.