Engineering Mechanics Questions

• The moment of inertia of a square of side a about its diagonal is
• According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
• A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.
• The maximum efficiency of a screw jack is
• The resultant of two forces P and Q acting at an angle θ is
• 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
• A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m / s2 in the direction of which it acts.
• A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
• Non-coplaner concurrent forces are those forces which
• The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ .
• The force which acts along the radius of a circle and directed towards the centre of the circle is known as centripetal force.
• A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is
• The centre of gravity of a trapezium with parallel sides a and b lies at a distance of y from the base b, as shown in the below figure. The value of y is
• Which of the following is a scalar quantity?
• The periodic time of a particle with simple harmonic motion is __________ proportional to the angular velocity.
• The unit of mass moment of inertia in S.I. units is kg-m2.
• If a number of forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are not in equilibrium.
• 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
• The periodic time of one oscillation for a simple pendulum is(where l = Length of the pendulum.)
• Energy may be defined as the capacity of doing work.