Q. If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

View solution

Q. The point, through which the whole weight of the body acts, irrespective of its position, is known as

View solution

Q. The loss of kinetic energy during elastic impact is zero.

View solution

Q. The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ .

View solution

Q. Which of the following is a scalar quantity?

View solution

Q. The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

View solution

Q. In ideal machines, mechanical advantage is __________ velocity ratio.

View solution

Q. The minimum force required to slide a body of weight W on a rough horizontal plane is

View solution

Q. The moment of inertia of a square of side a about its diagonal is

View solution

Q. The angular velocity (in rad / s) of a body rotating at N revolutions per minute is

View solution

Q. The maximum efficiency of a lifting machine is

View solution

Q. A machine having an efficiency less than 50%, is known as

View solution

Q. The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called

View solution

Q. The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

View solution

Q. The unit of mass moment of inertia in S.I. units is kg-m².

View solution

Q. The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is

View solution

Q. In a screw jack, the effort required to lift the load is given by(where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

View solution

Q. The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.

View solution

Q. A couple produces

View solution

Q. Energy may be defined as the capacity of doing work.

View solution