A couple produces
Moment of inertia of a circular section about its diameter (d) is
Energy may be defined as the capacity of doing work.
When the spring of a watch is wound, it will possess
The frequency of oscillation of a torsional pendulum is
A smooth cylinder lying on its convex surface remains in __________ equilibrium.
The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is
The angle between two forces when the resultant is maximum and minimum respectively are
Work done is said to be zero, when
A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
In ideal machines, mechanical advantage is __________ velocity ratio.
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.
The range of a projectile is maximum, when the angle of projection is
The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.
The path of the projectile is a parabola.
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force.
When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
The minimum force required to slide a body of weight W on a rough horizontal plane is
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 principle of transmissibility of forces states that, when a force acts upon a body, its effect is
Moment of inertia of a circular section about an axis perpendicular to the section is
The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.
Which of the following statement is correct?
The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
Concurrent forces are those forces whose lines of action
One watt is equal to
The moment of inertia of a square of side a about its diagonal is
The periodic time of a particle with simple harmonic motion is __________ proportional to the angular velocity.
A machine having an efficiency less than 50%, is known as
A differential pulley block has larger and smaller diameters ofmm andmm respectively. Its velocity ratio is
A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
A redundant frame is also called __________ frame.
The process of finding out the resultant force is called __________ of forces.
A weight ofN can be lifted by an effort ofN. If the velocity ratio isthe machine is
Which of the following are vector quantities?
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.
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
two like parallel forces are acting at a distance ofmm apart and their resultant isN. It the line of action of the resultant is 6 mm from any given force, the two forces are
If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.
The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
The motion of a particle round a fixed axis 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
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.
The unit of angular acceleration is
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