α = π/4 - β/2
α = π/2 + β/2
α = π/4 - β/2
α = β/2 - π/2

1 sec
½ sec
1.2 sec
1.5 sec

## Applied Mechanics and Graphic Statics A cube on a smooth horizontal surface

Cannot be in unstable equilibrium
Cannot be in neutral equilibrium
Cannot be in stable equilibrium
Can be in any of these states

## Applied Mechanics and Graphic Statics Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by

Its shorter side
The diagonal of the parallelogram which passes through the point of intersection of the forces
The diagonal of the parallelogram which does not pass through the point of intersection of the forces
Its longer side

## Applied Mechanics and Graphic Statics If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by

T = g(M1 + M2)/(M1 × M2)
T = g(M1 - M2)/(M1 + M2)
T = g(M2 + M1)/(M2 - M1)
T = g(M2 - M1)/(M1 + M2)

1.00 cm
0.25 cm
0.50 cm
0.75 cm