# Answer to Question #25861 in Mechanics | Relativity for WinKoOo

Question #25861

What is the relation between force and momentum?

Expert's answer

They are related by the fact that force is the rate at which momentum changes with respect to time:

F = dp/dt - Newton's 2nd Law

p - momentum;

F - force;

t - time;

m - mass;

v - speed;

If p = mv and m is a constant ( v<<c - speed of ligth ) , then F = dp/dt = m*dv/dt = ma

If F=constant:

F*Δt = ΔP

F = dp/dt - Newton's 2nd Law

p - momentum;

F - force;

t - time;

m - mass;

v - speed;

If p = mv and m is a constant ( v<<c - speed of ligth ) , then F = dp/dt = m*dv/dt = ma

If F=constant:

F*Δt = ΔP

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