II. Write the letter of the correct answer. 1. Which of the following shows a fast speed? A. 5m/s B. 2 k/h 2. Which of the following shows the slowest velocity? A. 5 km/h north B. 10 km/h south 3.What is the basic unit for measuring time? A. hour B. second 4. Which of the following is a measure of speed? B. m/s 5. A biker covers a distance of 150 km in five hours. What is the biker's speed? A. 150km/h B. 30 km/h 2 A. km