Robbery is forcible stealing. A person forcibly steals property and
commits robbery when, in the course of committing a larceny, he uses or
threatens the immediate use of physical force upon another person for
the purpose of:
1. Preventing or overcoming resistance to the taking of the property
or to the retention thereof immediately after the taking; or
2. Compelling the owner of such property or another person to deliver
up the property or to engage in other conduct which aids in the
commission of the larceny.