87.5mm
The point through which the Whole mass of the body acts, irrespective of the position of the body, is known as centre of gravity (briefly written as c.g.). The plane geometrical figures (like rectangle, triangle, circle etc.) have only areas but no mass. The centre of area of such figures is known as centroid or centre of gravity of the area of the body. It may be noted that every body has one, and only one, centre of gravity.
The centre of gravity a T-section 100mmX150mmX50mm from its bottom is 87.5 mm.
all of these
Moment of inertia is the
* second moment of force
* second moment of area
* second moment of mass
four times
Mass moment of inertia of a thin rod about its one end is four times the mass moment of inertia of the same rod about its mid-point.
limiting friction
The maximum frictional force, which comes into play, when an body just begins to slide over the surface of the other body, is known as limiting friction.
static friction
Static Friction The friction experienced by a body, when it is at rest is known as static friction.
Dynamic Friction The friction experienced by a body, when it is in motion is called dynamic friction. Dynamic friction is also called as kinetic friction.
