Which is a possible measurement of the momentum of a moving object? 11 kg∙m2/s2 2.8 kg∙m/s 16 kg∙m/s, due west 9.3 m/s2, due north

Momentum is a vector, although we don't hammer on that.  In order to completely describe a momentum, you need a magnitude AND a direction ... just like force and velocity.

So choice #2 is the magnitude of a momentum, without its direction.

Choice #3 is  the full package, with both the magnitude and the direction.

Choice #1 has units of energy, and choice #4 has units of acceleration, so neither of those can be it.

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

b perpendicular