Physics
Improve your experience by picking them
A painter places a 13 m long regular ladder against a vertical wall with negligible friction. The ladder's lower end is 5 m from the wall. Take the weight of the ladder to be 250 N and the coefficient of static friction between the floor and the ladder's foot to be 0.65. If a painter weighing 650 N climbs gently up the ladder, determine the maximum friction force that the floor can apply on the ladder's lower end.
An extendable pole that is 4m in length is placed against a smooth, vertical surface. The static friction coefficient between the pole and the ground is 0.50. Calculate the smallest angle the pole can form with the ground to stay in position without sliding.