CLIL - Science: Average speed

2. Check the meaning of the words in the box. Then read the equations and answer questions 1–2.

(Kiểm tra nghĩa của các từ trong hộp. Sau đó đọc các phương trình và trả lời các câu hỏi 1–2.)

The winner of the race is the person who has the fastest average speed.

To calculate average speed, you need the following equation:

distance/ time = average speed

distance: the race was 200m.

time: Fields completed the 200m in 161seconds.

So, average speed:

200/161 = 1.24 metres a second (m/s)

To calculate average speed in kilometres anhour (km/h), use this equation:average speed in m/s × 3.6 = average speedin km/h.

1. Look again at the table in exercise 1. Calculate the average speed of Gomez, Jones and O’Hara in m/s.

2. Now calculate the average speed of all the swimmers in km/h.

3. USE IT! Read the sentences and find each average speed in km/h.

(THỰC HÀNH! Đọc các câu và tìm tốc độ trung bình theo km/h.)

1. In 2014 Dennis Kimetto completed the Berlin Marathon in 2 hours, 2 minutes and 57 seconds (2.05 hours). The marathon was 42.19 kilometres.

2. In 2014 Dame Sarah Storey completed the 3 kilometre para-cycling track race in 3 hours, 32 minutes and 5 seconds (3.54 hours).

3. In 2015, Lewis Hamilton drove one lap (5.3 kilometres) in the Australian Grand Prix in 1 minute, 30 seconds.

4. In 2014 Sarah Sjöström swam the 50m butterfly in 24.43 seconds.