A train accelerating uniormly from rest attains a maximum speed of `40ms^(-1)`
Channel: Doubtnut
Date: 02/11/2021

A train accelerating uniormly from rest attains a maximum speed of `40ms^(-1)` in `20s`. It travels at this speed for `20s` and is brought to  rest with uniform retardation i further `40s`. What is the average velocity during this period?