Related Questions
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Coulomb friction is the friction between
A. Bodies having relative motion
C. Two lubricated surfaces
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According to principle of moments
A. If a system of coplanar forces is in equilibrium, then their algebraic sum is zero
B. If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
C. The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point
D. Positive and negative couples can be balanced
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4
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
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The C.G. of a right circular solid cone of height h lies at the following distance from the base
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A redundant frame is also called __________ frame.
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The amplitude is always __________ radius of the circle.
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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.)
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The centre of percussion of the homogeneous rod of length L suspended at the top will be
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Which of the following statement is correct?
A. The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation.
B. The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity.
C. The velocity of the particle moving with simple harmonic motion is zero at the mean position.
D. The acceleration of the particle moving with simple harmonic motion is maximum at the mean position.
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The maximum acceleration of a particle moving with simple harmonic motion is
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The acceleration of a particle moving with simple harmonic motion, at any instant is given by
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The velocity of a particle moving with simple harmonic motion is __________ at the mean position.
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A smooth cylinder lying on its convex surface remains in __________ equilibrium.
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One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring.)
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4
The bodies which rebound after impact are called
C. Neither elastic nor inelastic bodies
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The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is
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The unit of work or energy in S.I. units is
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During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
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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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The moment of inertia of a square of side a about its diagonal is
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According to Lamis theorem
A. The three forces must be equal
B. The three forces must be at 120° to each other
C. The three forces must be in equilibrium
D. If the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two
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Forces are called coplanar when all of them acting on body lie in
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The energy possessed by a body, for doing work by virtue of its position, is called
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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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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
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The forces which do not meet at one point and their lines of action do not lie on the same plane are known as
A. Coplanar concurrent forces
B. Coplanar non-concurrent forces
C. Non-coplanar concurrent forces
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In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is
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If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
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A force is completely defined when we specify
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The ideal angle of banking provided on the curves on roads depends upon
B. (Velocity)2 of the vehicle
C. Nature of the road surface
D. Coefficient of friction between the road and vehicle contact point