the driving force on the train was 12000N how large must be the force applied in order to stop the train

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

As you lift an 88 n box straight upward you produce a power of 72 w. what is the speed of the box?