Check the meaning of the words in the box.

Then read the information and answer the

questions.

distance time average speed

calculate equation

To calculate average speed, you need the

following equation:

distance

time

= average speed

Example

Distance: a lap was 300 metres long.

4 x 300 metres = 1,200 metres

Time: Adams completed the 1,200 metres

in 63 seconds

So, average speed: 1,200 = 19.05 metres

63 per second (m/s)

To calculate average speed in kilometres

per hour, use this equation:

Average speed in metres per second (m/s)

x 3.6 = average speed in kilometres per hour

(km/h)

1 Look again at the table in exercise 1.

Calculate the average speed of Gollob, Olsen

and Crump, in m/s.

2 Now calculate the average speed of all the

riders in km/h.​

1. Childhood obesity is a very serious disease.( детское ожирение-очень серьезное заболевание)
2. He is suffering from overweight.(он страдает от излишнего веса)
3. Inactivity leads to overweight. (низкая активность ведет к излишнему весу)
4. Overeating is a bad habit.(переедание-плохая привычка)
5. He can't skip because of his disease.(он не может прыгать на скакалке из-за своей болезни)
6. Such lifestyle can lead to disease.(такой образ жизни может привести к болезни)
7. This disease is unknown.(это заболевание неизвестно)
8. It's better to snack with an apple.(лучше перекусить яблоком)
9. I don't like his lifestyle.(мне не нравится его образ жизни)
10. He used to keep to a diet wheh he was younger.(когда он был моложе он придерживался диеты)

Artos and his family lived on the farm. He was only seven. Angles and Saxons were enemies of his tribe. His father worried because Saxons king had come to their land with a great army and burnt their farm. Artos hated the Angles and Saxons. They first came to Britain in the fifth century after the Romans had left. The Angles and Saxons landed on the east coast, near London, and moved west. They even called this land Anglia-the land of the Angles. Artos and his tribe had a motto: «Fight of the ring. Fight with the ring. Fight in the ring.» The ring was the most valuable thing in the tribe. Artos had a very strange dream. In the morning he went to the priest. The boy told the priest about his dream. The priest did not know what to do. Artos said what the ring had said. The priest told him to do what he had to do, and not to be afraid.