80
30
60
50

## Applied Mechanics and Graphic Statics The phenomenon of collision of two elastic bodies takes place because bodies

All listed here
Tend to compress each other till they are compressed maximum possible
Immediately after collision come momentarily to rest
Attempt to regain its original shape due to their elasticities

## Applied Mechanics and Graphic Statics A body of weight ‘w’ placed on an inclined plane is acted upon by a force ‘P’ parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is ‘θ’ and angle of friction is ‘φ’, the minimum value of ‘P’, is

w sin (θ - φ)/cos φ
w cos (θ + φ)/cos φ
w sinθ cos(θ - φ)/sin φ
w sin (φ - θ)/cos φ

## Applied Mechanics and Graphic Statics Centre of gravity of a thin hollow cone lies on the axis of symmetry at a height of

One-third of the total height above base
One-half of the total height above base
One-fourth of the total height above base
None of these

2P sin θ/2
P cos θ/2
P tan θ/2
2P cos θ/2

90°
30°
45°