A train is observed to pass two successive kilometre posts while moving along a…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A train is observed to pass two successive kilometre posts while moving along a straight track. It takes 20s to travel from the first post to the second and its speed increases from 15m/s to 20m/s in this interval. The train continues to accelerate uniformly after the second post and attains a speed of 25m/s over the next 15s.
(i) Calculate the uniform acceleration of the train between the two kilometre posts.
(ii) Determine the distance between the two kilometre posts to the nearest metre.
(iii) Find the uniform acceleration of the train after the second post.
(iv) Compute the total distance covered by the train in the entire 35s interval described.