Engineering Mechanics Questions

• Coefficient of friction depends upon
• A force acting in the opposite direction to the motion of the body is called force of friction.
• For any system of coplaner forces, the condition of equilibrium is that the
• The velocity ratio of a single purchase crab winch can be increased by
• A science teacher claimed that Newton's third law of motion is involved while studying the motion of rockets. His statement is
• The maximum displacement of a body, from its mean position is called amplitude.
• The moment of inertia of a square of side (a) about an axis through its centre of gravity is
• The ratio of static friction to dynamic friction is always
• A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is(where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)
• A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
• The motion of a wheel of a car is
• The slope on the road surface generally provided on the curves is known as
• A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
• The moment of inertia of a thin rod of mass m and length l,about an axis through its centre of gravity and perpendicular to its length is
• The cartesian equation of trajectory is(where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)
• When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is
• All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.
• The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is
• Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces.
• The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.