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

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular