Which of the following is the best coordinate system to analyze a painter climbing a ladder at an angle of 60° to the ground?

a.

x-axis: horizontal along the ground; y-axis: along the ladder

b.

x-axis: along the ladder; y-axis: horizontal along the ground

c.

x-axis: horizontal along the ground; y-axis: up and down

d.

x-axis: along the ladder; y-axis: up and down