Answer Happy

A uniform ladder stands on a rough floor and rests against africtionless wall as shown in the figure. Since the floor is rough,it exerts both a normal force N1 and a frictional force f1 on theladder. However, since the wall is frictionless, it exerts only anormal force N2 on the ladder. The ladder has a length of L = 4.8m, a weight of WL = 51.5 N, and rests against the wall a distance d= 3.75 m above the floor. If a person with a mass of m = 90 kg isstanding on the ladder, determine the following.
(a) the forces exerted on the ladder when the person is halfwayup the ladder (Enter the magnitude only.)
N1 = 933.5 N
N2 = 372.15 N
f1 = 372.15 N
(b) the forces exerted on the ladder when the person isthree-fourths of the way up the ladder (Enter the magnitudeonly.)
N1 = ___ N ???
N2 = 547.96N
f1 = ____ N ???