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1.
The coefficient of friction depends upon
2.
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is
3.
In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than
4.
A machine having an efficiency greater than 50%, is known as
5.
The algebraic sum of moments of the forces forming couple about any point in their plane is
6.
In the lever of third order, load
7.
Which of the following statement is correct?
8.
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
9.
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.
10.
Coulomb friction is the friction between