1. A firefighter with a mass of 100 kg slides down a vertical pole at a constant speed. Show that the force of friction provided by the pole is about 1000 N. 2. The ocean’s level is currently rising...

1. A firefighter with a mass of 100 kg slides down a vertical pole at a constant speed. Show that the force of friction provided by the pole is about 1000 N.

2. The ocean’s level is currently rising at about 1.5 mm per year. Show that at this rate the sea level will be 3 m higher in 2000 years.