Force in a continuous body

Refer to the figure describing the body with surface and volume element. This body is truly representing

• An airplane
• An automobile
• Thin foil in an electronic circuit
• Fluid flow around a jet

This body is acted upon by

Surface forces	Body forces	Momental forces (rotational effect)
Concentrated (at a point) Distributed (over a surface)	Gravitational Inertial Thermoelastic	Magnetic Electorstrictive Piezoelectric