Related Questions
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If the body falls freely under gravity, then the gravitational acceleration is taken as
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The point, through which the whole weight of the body acts, irrespective of its position, is known as
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4
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is
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4
In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will
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4
In order to completely specify angular displacement by a vector, it must fix
A. Direction of the axis of rotation
B. Magnitude of angular displacement
C. Sense of angular displacement
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4
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.
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4
Pick up wrong statement about friction force for dry surfaces. Friction force is
A. Proportional to normal load between the surfaces
B. Dependent on the materials of contact surface
C. Proportional to velocity of sliding
D. Independent of the area of contact surfaces
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4
The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is
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4
According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then
A. Their algebraic sum is zero
B. Their lines of action are at equal distances
C. The algebraic sum of their moments about any point in their plane is zero
D. The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
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A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
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Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
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Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity v is made to strike the second ball. Both the balls after impact will move with a velocity
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The moment of inertia of a thin disc of mass m and radius r, about an axis through its centre of gravity and perpendicular to the plane of the disc is
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Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its midpoint
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In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.
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The bellow figure shows the three coplanar forces P, Q and R acting at a point O. If these forces are in equilibrium, then
A. P/sin β = Q/sin α = R/sin
B. P/sin α = Q/sin β = R/sin
C. P/sin = Q/sin α = R/sin β
D. P/sin α = Q/sin = R/sin β
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4
The centre of gravity of a trapezium with parallel sides a and b lies at a distance of y from the base b, as shown in the below figure. The value of y is
B. (h/2) [(2a + b)/(a + b)]
C. (h/3) [(2a + b)/(a + b)]
D. (h/3) [(a + b)/(2a + b)]
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The unit of power in S.I. units is
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Limiting force of friction is the
A. Tangent of angle between normal reaction and the resultant of normal reaction and limiting friction
B. Ratio of limiting friction and normal reaction
C. The friction force acting when the body is just about to move
D. The friction force acting when the body is in motion
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4
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)
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Which of the following is a vector quantity?
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A number of forces acting at a point will be in equilibrium, if
A. All the forces are equally inclined
B. Sum of all the forces is zero
C. Sum of resolved parts in the vertical direction is zero (i.e. ΣV = 0)
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The force induced in the string AB due to the load W, as shown in the below figure is
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Which of the following are vector quantities?
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The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
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The maximum acceleration of a particle moving with simple harmonic motion is
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In actual machines, mechanical advantage is __________ velocity ratio.
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Which of the following is the example of lever of first order?
C. Pair of clinical tongs
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The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
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The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is