If mass A is 1.0 kg, mass B is 5.0 kg, and the frictionless pulley has a mass of 0.5 kg and a radius of 0.15 m, what is the amount of downward force (in Newtons) acting on each mass? a. A = 9.81 N, B = 49.05 N
c. A = 49.05 N, B = 9.81 N
b. A = 16.35 N, B = 16.35 N
d. A = 9.81 N, B = 16.35 N

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.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

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