Initial velocity is per node or per part? [SOLVED]

Hello,

Lets say I want my object containing 1000 nodes to travel at 100 m/s.

Should the velocity be 100 m/s or 100/1000=0.1 m/s?

Also what should be the corresponding selection for GRNOD field in BC Manager - Parts or Nodes?

Please guide me for HyperMesh RADIOSS(Block 120).