## Applied Mechanics and Graphic Statics A projectile is thrown at an angle ‘α’ to the horizontal with velocity ‘v’. It will have the maximum centripetal acceleration

As it strikes the ground
At the top of the trajectory
At the start
Elsewhere

Less than 1
Greater than 2
Between 1 and 2
Equal to 1

## Applied Mechanics and Graphic Statics Lami's theorem states that

Three coplanar forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two
Three forces acting at a point are always in equilibrium
If three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium
Three coplanar forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two

## Applied Mechanics and Graphic Statics If the resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’ makes an angle ‘α’ with ‘P’, then tan α equals

Q sin θ/P + Q sin θ
P sin θ/P + Q tan θ
P sin θ/P - Q cos θ
Q sin θ/P + Q cos θ

## 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
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
All of these
The force of friction always acts in a direction opposite to that in which a body is moving

## Applied Mechanics and Graphic Statics A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are

1436.2 kN and 1500 kN
1346.3 kN and 1250 kN
1436.2 kN and 1250 kN
1346.3 kN and 1500 kN