Question

An athlete completes one round of a circular track of diameter 200 m in 40s . What will the displacement at the end of the 2minutes 40s ?

Answer 1

distance: 800 meters

displacement: 0 meters

Answer 2

AnswEr:

Let athlete runs a track of extra 0.

Radius of track,

$\tt \: r = \cancel\frac{200}{2} = 100m.$

Round complete in 40 s = 1

Rounds complete in 2 min 20 s i.e. 140 s

$\tt = \cancel \frac{140}{40} = 3.5$

• Distance covered = 3.5 times for circumference

$\tt = 3.5 \times 2\pi \: r \\ \\ \tt = 3.5 \times 2 \times \frac{22}{7} \times 100 \: m \times 2 \\ \\ \tt = 2200 \: m$

Therefore distance ( s) will be 2200 m

• Displacement = 0

Therefore, Displacement will be 0.