(i) What type of motion is represented by the object during 0-6 s?
(ii) Calculate the acceleration in first 6 s.
(iii) Calculate the distance travelled between 6-8 s.
(iv) Calculate the retardation during 12-14 s.
OR
On a 100 km track, the train travels the first 30 km at a uniform speed of 30 km/h. How fast must the train travel the next 70 km so as to make average speed 40 km/h for the whole trip?