Mr. X ( mass 96.0 kg ), he just finished a rather large breakfast) is finally getting around to taking down his holiday lights when a sudden ice storm hits. the coefficient of static friction between his ladder (mass 16.4 kg ) and the level ground has been reduced to 0.090. To reach the lights Mr. X must climb 4.20 m up the 5.00m ladder. To improve on his frictional force, Mr.X gets Mr.Y to stand on the first rung of the ladder which is located 0.42m from the ground, will Mr. X reach the lights safely? There is no friction between the ladder and the wall and the ladder makes an angle of 68° with the ground.
Fun = ma
torque = R. F.
Ff= fn ( coefficient of friction)
The Attempt at a Solution
i really don't know where to start, what should i calculate first, i tried to calculate the amount of force that the co-efficient of friction can handle but i don't know how to do this, and i'm confused as to what forces are acting on the ladder.
i know that there will be a force off the wall, a normal force off of the ground and a gravity force from Mr.Y, but do i take account a gravitational force from Mr.X even though he's moving up the ladder ?