1.63. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be

2.62. In the equation of virtual work, following force is neglected

3.59. The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be

4.70. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction

5.73. On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be