Federal statute providing for incarceration for murder with a firearm is a separate offense, not a sentencing enhancement, given post-Apprendi jurisprudence.
Statute requiring the element of physical force in the commission of a felony implies the requirement of violent force.
Offensive touching can be sufficient force for Hobbs Act robbery.
Indirect force can be a use of physical force under the statute.
https://www.ca10.uscourts.gov/opinions/16/16-2018.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.