The acceleration of a particle moving with simple harmonic motion is proportional to the displacement of the particle from the mean position.
The time of flight of a projectile on downward inclined plane depends upon
A force while acting on a body may
The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ω radian/s is given by
The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is
The efficiency of a lifting machine is the ratio of
The force applied on a body of masskg to produce an acceleration of 5 m/s2, is
When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.
The term 'centroid' is
A lifting machine lifts a load ofthrough a distance of 0.2 m by means of an effort ofthrough a distance of 1m. This machine is an ideal one.
Which of the following statement is correct in connection with projectiles?
A number of forces acting at a point will be in equilibrium, if
The unit of energy in S.I. units is
One kg force is equal to
The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is
The unit of moment of inertia of an area is
A force acting in the opposite direction to the motion of the body is called force of friction.
A screw jack used for lifting the loads is
The force induced in the string BC due to the load W as shown in the below figure is
The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.
The velocity ratio of a differential wheel and axle with D as the diameter of effort wheel and d1,and d2 as the diameters of larger and smaller axles respectively, is
When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail.
The motion of the body from one extremity to the other is known as a beat.
Two forces are acting at an angle of 120°. The bigger force isand the resultant is perpendicular to the smaller one. The smaller force is
The angle of inclination of the plane at which the body begins to move down the plane, is called
Coefficient of friction depends upon
A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
Frequency of vibrations means the number of cycles per second.
The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.
If a body is acted upon by a number of coplaner non-concurrent forces, it may
Which of the following statement is incorrect?
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act
A circular hole ofmm diameter is cut out from a circular disc ofmm diameter as shown in the below figure. The centre of gravity of the section will lie
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.
The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is
The radius of gyration is the distance where the whole mass (or area) of a body is assumed to be concentrated.
An irregular body may have more than one centre of gravity.
In a screw jack, the effort required to lift the load is given by(where W = Load lifted, α = Helix angle, and φ = Angle of friction.)
If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.
The rate of doing work is known as
The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of
In a wormed geared pulley block, if the number of teeth on the worm wheel is doubled, then its velocity ratio is also doubled.
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