30 m/sec
50 m/sec
20 m/sec
40 m/sec

## Applied Mechanics and Graphic Statics The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

None of these
(a² + ab + b²)/3 (a + b)
(b² + bc + c²)/3 (b + c)
(a² + ab + c²)/3 (a + c)

2300 m
2100 m
2200 m
2000 m

Dyne
Joule
Newton
Erg

## Applied Mechanics and Graphic Statics The forces which meet at one point and have their lines of action in different planes are called

Non-coplanar concurrent forces
Non-coplanar non-current forces
Coplanar non-concurrent forces
Intersecting forces

## Applied Mechanics and Graphic Statics According to Law of Triangle of Forces

Three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force
If three forces acting on a, point can be represented in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium
If the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third
Three forces acting along the sides of a triangle are always in equilibrium