CCAN SOMONE HELP WITH THIS PLS ASAP

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?