6.101. The maximum frictional force which comes into play when a body just begins to slide over another surface is called

7.108. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

8.113. The C.G. of a solid hemisphere lies on the central radius 3r

9.128. In the lever of third order, load W, effort P and fulcrum F are oriented as follows

10.98. The algebraic sum of moments of the forces forming couple about any point in their plane is