Question

an athlete complete one round of a circular track of diameter of 200min 4 second what will be the distance covered and the displacement at the end of 2 mins 20 second​

Answer 1

Answer:

First of all,

It should be 40 seconds, not 4 seconds.

Distance covered - 2200m

Displacement - 200m

Explanation:

Diameter is 200m.

So, the radius will be 100m ( 2r=200 => r=100m)

2 minutes 20 seconds is equals to 140 seconds in total.

In 40 seconds, the athelete completes one round.

So, in 140 seconds the athlete will complete = 140/40= 3.5 rounds

One round is considered as Circumference.

Distance covered in 140 seconds = 2πr x 3.5

= 2 x 3.14 x 100

x 3.5

= 2200m

For each complete round the displacement is zero. Therefore for 3 complete rounds, the displacement will be zero.

At the end of his motion, the athlete will be in the diametrically opposite position. That is, displacement = diameter = 200 m.

Hence, the distance covered is 2200 m and the displacement is 200 m.

Answer 2

Explanation:

Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. In vertebrates, it is composed of blood cells suspended in blood plasma.