Рабочий, толкающий неподвижную повозку, в течение некоторого времени перемещает ее равноускоренным движением, во сколько раз работа, совершенная рабочим за вторую половину времени движения, превышает работу, совершенную за первую половину

I don't know the specific formula or method to solve the problem you've described. However, it seems to involve calculating the work done by a worker pushing a stationary cart with accelerated motion over a certain period of time, and comparing the work done in the first half of the motion with the work done in the second half. Please consult your textbook or teacher for guidance on solving this problem.