The CN tower in 553m tall. Suppose a chuck of ice w/ a mass of 25.0g falls from the top of the tower. The speed of the ice is 33.0m/s as it passes the restaurant in the tower located 353m above the ground. What is the average force due to air resistance? I'm having trouble getting started on this problem. I know how to calculate work and change in KE, but how do I use those to get the answer? Any help would be appreciated.