The graph below demonstrates how the golf swing is very much like a bullwhip action. As the segment (in this case the part of your body) gets smaller in mass, it slows its acceleration, allowing the energy to continue traveling out more distally.
The blue line represents the clubhead. You can see clearly how much faster it is moving than any of the parts of the body in a good swing. It reaches it’s peak speed after the lead arm begins slowing down. This is not something we feel or try for – it is just the way a good swinger transfers energy supply.