## Applied Mechanics and Graphic Statics Force polygon method is applicable for

A system of parallel forces only
Any coplanar force system
Non-concurrent coplanar force system
Concurrent coplanar force system

0.25 cm
0.75 cm
1.00 cm
0.50 cm

102.5 kg
108.5 kg
105.5 kg
110 kg

## Applied Mechanics and Graphic Statics The member forces in a statically in determinate truss

Cannot be obtained by graphic statics
Can be obtained by graphic statics by trial and error
May be obtained by graphic statics
Can be obtained by graphic statics

## Applied Mechanics and Graphic Statics The following statement is one of the laws of Dynamic friction

The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction
The force of friction always acts in a direction opposite to that in which a body is moving
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
All of these

60 kg
100 kg
40 kg
10 kg