"Find the initial downward acceleration a of an iron ball of density p =7.60 g/cm3 when submerged in water and released from rest. (Use pwater = 1000 kg/m3)."
My steps so far:
1. I converted p=7.60g/cm3 to p=.76kg/m3.
2. I drew a free-body diagram, taking the buoyant force upwards as...
A 36-kg shell is fired from a gun with a muzzle velocity 185 m/s at 59 degrees above the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. What is the horizontal...