1. Suppose you are standing on a train accelerating at 0.20 g. What minimum coefficient of static…

1. Suppose you are standing on a train
accelerating at 0.20 g. What minimum coefficient of static friction must exist
between your feet and the floor if you are not to slide?

2. The coefficient of static friction
between hard rubber and normal street pavement is about 0.90. On how steep a
hill (maximum angle) can you leave a car parked?