84501. If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be
84502. The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.
84503. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
84504. A smooth cylinder lying on a __________ is in neutral equilibrium.
84505. Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then
84506. A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
84507. The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.
84508. The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)
84509. In actual machines, mechanical advantage is __________ velocity ratio.
84510. The radius of gyration is the distance where the whole mass (or area) of a body is assumed to be concentrated.
84511. 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.
84512. 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
84513. When the spring of a watch is wound, it will possess
84514. In a framed structure, as shown in the below figure, the force in the member CD is tensile in nature.
84515. An irregular body may have more than one centre of gravity.
84516. The rate of doing work is known as
84517. In a wormed geared pulley block, if the number of teeth on the worm wheel is doubled, then its velocity ratio is also doubled.
84518. Moment of inertia of a circular section about its diameter (d) is
84519. The centre of oscillation and centre of suspension for a compound pendulum are interchangeable.
84520. In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.
84521. The unit of work in S.I. units is
84522. The static friction
84523. The acceleration of a particle moving with simple harmonic motion is __________ at themean position.
84524. The velocity of a particle moving with simple harmonic motion is __________ at the mean position.
84525. A framed structure is imperfect, if the number of members are __________ (2j - 3).
84526. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad / s2, is
84527. The total energy possessed by a system of moving bodies
84528. The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is
84529. 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.)
84530. The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.
84531. A couple produces
84532. Energy may be defined as the capacity of doing work.
84533. For a self locking machine, the efficiency must be
84534. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
84535. Onejoule is equal to
84536. Whenever a force acts on a body and the body undergoes a displacement, then
84537. When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.
84538. If the body falls freely under gravity, then the gravitational acceleration is taken as
84539. A framed structure, as shown in the below figure, is a
84540. The rate of change of displacement of a body is called
84541. The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.)
84542. The periodic time (T) is given by(where ω = Angular velocity of particle in rad / s.)
84543. Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to
84544. If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is
84545. When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail.
84546. Frequency of vibrations means the number of cycles per second.
84547. The velocity ratio for the third system of pulleys is
84548. If the gravitational acceleration at any place is doubled, then the weight of a body will be
84549. The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is
84550. The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by
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