A 60-Kg Man Is One Fourth of the Way Up

Multiple Choice

A 60-kg man is one fourth of the way up a 10-m ladder that is resting against a smooth,frictionless wall.If the ladder has a mass of 25 kg and it makes an angle of 60° with the ground,find the force of friction of the ground on the foot of the ladder.

A) 1.4E+1 N
B) 1.6E+2 N
C) 2.4E+2 N
D) 2.7E+2 N
E) ​4.2E+3 N