Question

an athlete runs around a circular track of 350m.if e runs 2 and half rounds what is distance and displacemnt?

Answer 1

Half round: distance= 628 metres, displacement = 400 metres

One round: distance = 1256 metres, displacement = 0 metres

Given:

Radius of the circular track = 200 metres

To find:

Distance and displacement in:

Half round

One complete round

Distance:

The circumference of the circle will be the distance covered in one round whereas half of the circumference will be distance covered in half roun

Half round:

Circumference of circle =

Circumference of semicircle =

\Distance = 3.14×200

Distance = 628 metres

the distance covered in half round is equal to 628 metres

One round:

Distance =

Distance = 2×3.14×200

Distance = 1256 metres

The distance covered in one round is equal to 1256 metres

Displacement:

Half round:

The displacement at the half round will be equal to the diameter of the circle

Diameter = 2×Radius

Diameter = 2×200

Diameter = 400 metres

The displacement at end of half round will be equal to 400 metres

One round:

The displacement will be equal to 0 as the athlete will come to initial position.

It is Just a example Hope next u can do urself !!

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Answer 2

$\bf\huge\underline{\underline{ Given :- }}$

• circular track

• total length of track = 350 m

• an athlete runs 2 and half rounds

$\bf\huge\underline{\underline{ To \: Find:- }}$

• Distance

• Displacement

$\bf\huge\underline{\underline{ Answer :- }}$

• for 1 round = 350 m

• for 2 and half rounds = 875 m

$\rule{10cm}{0.05cm}$

• Distance = 875 m

• 2π r = 350 , r = 55.73 m

• Displacement = 111.4 m [ for first two rounds is 0]