consider the following system where f= 90N, m=4kg, and M=7kg. what is the magnitude of the force with which one block acts on the other?

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

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?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds