Which model of the solar system best supports retrograde motion of the planets?
a. ptolemy's model
b. the geocentric model
c. the heliocentric model
d. an earth-centered model

i sometimes feel that way too. i feel that i should hurt someone because they hurt me, but i wouldnt do it. that would make things so much worse i have so much experience with this stuff

explanation:

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.