Engineering Mechanics Questions

• Resultant of two forces: angles for extremal magnitude For two forces of fixed magnitudes, the resultant is maximum at which angle between them, and minimum at which angle (respectively)? Choose the correct ordered pair.
• Type of pendulum: small oscillations of a suspended rigid body under gravity A rigid body is suspended vertically and oscillates with a small amplitude due to gravity. Identify the correct term for this system.
• Inclined plane with vertical effort: velocity ratio (VR) An inclined plane makes an angle θ with the horizontal. The load is pulled up the plane by a vertical effort (idealized, no losses). Find the velocity ratio VR = (distance moved by effort) ÷ (distance moved by load). Choose the correct expression.
• Resultant of two equal forces: find the angle between them Two forces of equal magnitude act at a point. The resultant has the same magnitude as either force. Choose the correct angle between the two forces.
• Triangle law of forces: verify the statement for the resultant Statement: “If two forces acting simultaneously on a particle are represented (in magnitude and direction) by two sides of a triangle taken in order, then their resultant is represented by the third side of the triangle taken in the opposite order.” Decide whether the statement is correct.
• Torsional pendulum: frequency of oscillation formula Let I be the mass moment of inertia of the suspended body and C be the torsional constant (restoring couple per radian). Select the correct expression for the frequency of oscillation f.
• Which of the following statement is correct?
• The point, through which the whole weight of the body acts, irrespective of its position, is known as
• A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
• The maximum efficiency of a lifting machine is
• The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
• The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
• The process of finding out the resultant force is called __________ of forces.
• In a framed structure, as shown in the below figure, the force in the member BC is
• 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.
• The motion of a particle round a fixed axis is
• The minimum force required to slide a body of weight W on a rough horizontal plane is
• The acceleration of a particle moving with simple harmonic motion, at any instant is given by
• The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.
• If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium.