## Applied Mechanics and Graphic Statics One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is

a damped oscillatory motion
a rectilinear motion with constant speed
None of these
a simple harmonic motion

## Applied Mechanics and Graphic Statics A point subjected to a number of forces will be in equilibrium, if

Algebraic sum of the forces is zero
Two resolved parts in any two directions at right angles are equal
Algebraic sum of the moments of the forces about the point is zero
Sum of resolved parts in any two directions at right angles, are both zero

10.4 t
10.2 t
10.8 t
10.6 t

## Applied Mechanics and Graphic Statics Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

Concurrent
Parallel
None of these
Concurrent parallel

Linear momentum
An acceleration
Retardation
Uniform speed

A√2
A/2
A/√2
A