Related Questions
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4
The velocity of a particle moving with simple harmonic motion is __________ at the mean position.
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In order to determine the effects of a force, acting on a body, we must know
A. Magnitude of the force
B. Line of action of the force
C. Nature of the force i.e. whether the force is push or pull
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4
The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ √(gra/h)
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The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is
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Forces are called concurrent when their lines of action meet in
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The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
A. Principle of independence of forces
B. Principle of resolution of forces
C. Principle of transmissibility of forces
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4
The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is
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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
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Center of percussion is
B. The point of metacenter
C. The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
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The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)
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Effect of a force on a body depends upon
C. Position or line of action
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The Cartesian equation of trajectory is (where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)
A. y = (gx²/2u² cos²α) + x. tanα
B. y = (gx²/2u² cos²α) - x. tanα
C. y = x. tanα - (gx²/2u² cos²α)
D. y = x. tanα + (gx²/2u² cos²α)
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Which of the following is not a vector quantity?
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The velocity ratio of a single purchase crab winch can be increased by
A. Increasing the length of the handle
B. Increasing the radius of the load drum
C. Increasing the number of teeth of the pinion
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4
Centre of gravity of a solid cone lies on the axis at the height
A. One fourth of the total height above base
B. One third of the total height above base
C. One-half of the total height above base
D. Three eighth of the total height above the base
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4
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is
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If a rigid body is in equilibrium under the action of three forces, then
A. These forces are equal
B. The lines of action of these forces meet in a point
C. The lines of action of these forces are parallel
D. Both (B) and (C) above
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Which of the following do not have identical dimensions?
D. Moment of a force and angular momentum.
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The maximum efficiency of a lifting machine is
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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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The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is
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The maximum height of a projectile on a horizontal plane, is
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Which of the following is a scalar quantity?
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The time of flight (t) of a projectile on an upward inclined plane is (where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)
A. t = g cos β/2u sin (α - β)
B. t = 2u sin (α - β)/g cos β
C. t = g cos β/2u sin (α + β)
D. t = 2u sin (α + β)/g cos β
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In actual machines, mechanical advantage is __________ velocity ratio.
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The angle of inclination of the plane at which the body begins to move down the plane, is called
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In a framed structure, as shown in the below figure, the force in the member AB is __________ the force in member AC.
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In ideal machines, mechanical advantage is __________ velocity ratio.
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If a number of forces are acting at a point, their resultant is given by
C. (ΣV)2 +(ΣH)2 +2(ΣV)(ΣH)
D. √[(ΣV)2 +(ΣH)2 +2(ΣV)(ΣH)]
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The energy possessed by a body, for doing work by virtue of its position, is called