My fanart of todoroki

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.