Preposition: of

• photon: It follows that the momentum of each photon can be changed in direction without any change of speed.

• particle: The total energy of a free particle is given by where p is the momentum of the particle.

• electron: That the photons impacting the page anyone reads are changing the momentum of electrons in the page is scarcely a concern to the reader.

Converse of object

• gather: The global economic recovery has gathered less momentum than forecast in Budget 2002.

• gain: Our strategy is gaining positive momentum across the business.

• maintain: They also have their sights on running the New York Marathon next year to maintain funding momentum.

• sustain: Mr Douglas has organized an intensive program of more than two events a month to sustain momentum in the first year.

• regain: Happily, George judged things correctly and regained some forward momentum before stepping back too far.

• lose: The upward swing enjoyed over the past three years is losing momentum.

Adjective modifier

• angular: This angular momentum leads to a magnetic moment of fixed size for each particle.

• unstoppable: His determined focus was such that his march toward more major triumph had begun to assume unstoppable momentum.

• orbital: We devise an equivalent of the Jones matrix formulation for light possessing orbital angular momentum.

• upward: He suggested that the challenge ahead is to maintain an upward momentum.

Modifies a noun

• tensor: A scalar field with a potential V, will have the energy momentum tensor shown on the screen.

• flux: This result conflicts with claims that there is no solar cycle variation in solar wind momentum flux.

• stock: Discover momentum stocks in a snap and choose only the best every day.

• equation: Syllabus: Brief review of fluids ( continuity equation, momentum equation, energy equation ).

Noun used with modifier

• gathering: The rise of the Gordons and the Campbells gained a gathering momentum from now on, as these two powerful families became government policemen.