1. An 9.0 m, 290 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0 degree angle with the ground. How far up can the ladder can an 830 N person climb before the ladder begins to slip?
________m (answer)
2. A 220-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 37 degrees with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?
__________rad/s (answer)