a) total time taken for journey
b) the acceleration during the first part of the journey
![a total time taken for journeyb the acceleration during the first part of the journey class=](https://us-static.z-dn.net/files/dc9/30dc05a2e505593962b02dd8d4c7888e.jpg)
Explanation:
a. the total time taken for the journey is 50sec.
b. u=0, v=10m/sec, t=20sec.
a=(v-u)/t = (10-0)/20 = 10/20 = 0.5 m/s².
hope this helps you to solve the problem.