Engineering Mechanics Questions

• A machine having an efficiency less than 50%, is known as
• The loss of kinetic energy during elastic impact is zero.
• Newton's second law motion __________ a relation between force and mass of a moving body.
• Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
• 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.
• If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and v2 are their velocities after impact, then coefficient of restitution is given by
• Concurrent forces are those forces whose lines of action
• The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is
• Which of the following are vector quantities?
• The maximum acceleration of a particle moving with simple harmonic motion is
• In ideal machines, mechanical advantage is __________ velocity ratio.
• The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
• In a framed structure, as shown in the below figure, the force in the member AC is numerically equal to the force in member BC.
• The centre of gravity of an is osceles triangle with base (p) and sides (q) from its base is
• Two bodies of masses m1,and m2 are hung from the ends of a rope, passing oyer a frictionless pulley as shown in the figure below. The acceleration of the string will be
• Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
• 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