You are riding on a skateboard. If you are on a rough asphalt road and you push off as hard as you can one time, you will coast for 20 feet before you stop. If you are on a
smooth concrete sidewalk and you push off as hard as you can, you will coast for 30
feet before you stop. What force is causing you to slow down to a stop on each
surface? Why are you able to coast farther on one surface than the other?

Explanation:

The rocks sope you befor the smooth sidewalk will.

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y