1. Calculate the acceleration of Job riding his bicycle which speeds up from 5 m/s to 8 m/s in 7 seconds.
2.Pablo walked 25.5 km in 5 hours. Find his speed in m/s .
3. A ball rolls along a straight line. 5 points First it travels at a velocity of 8 m/s for 4 s and then continues at the same direction with 5 m/s for 2 s. What is its average velocity?