A stone is dropped from the top of a tall building. After 13 s of free fall, what is the displacement y of the stone

You are standing on a boat. which of the following strategies will make the boat start moving? a. pushing the mast b. throwing some cargo out of the boat c. pushing the front ofthe boat d. pushing another passenger

When solid surfaces slide over each other the kind of friction that occurs is called friction

How to know which equation of motion to use where?explain