Question

√an athlete complete half a round of circular track of radius R .the displacement travelled is

R

2R

ZERO

√2R

Answer 1

$\blue{\bold{\underline{\underline{Answer:}}}}$

$\green{\tt{\therefore{Displacement=2R}}}$

$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

$\green{\underline \bold{Given :}} \\ \tt: \implies Radius \: of \: circular \: track = R\\ \\ \red{\underline \bold{To \: Find :}} \\ \tt: \implies Displacement =?$

• According to given question :

$\bold{As \: we \: know \: that } \\ \tt: \implies Displacement = Final \: position - Initial \: position \\ \\ \tt: \implies Displacement =2R - 0 \\ \\ \green{\tt: \implies Displacement =2R} \\ \\ \bold{For \: Distance \: travel : } \\ \tt: \implies Distance \: travel = Half \: of \: circular \: ground \\ \\ \tt: \implies Distance \: travel = \frac{Circumference \: of \: circle}{2} \\ \\ \tt: \implies Distance \: travel = \frac{2\pi R}{2} \\ \\ \green{\tt: \implies Distance \: travel =\pi R}$