Related Questions
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The horizontal range of a projectile (R) is given by
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The moment of inertia of a sphere of mass m and radius r, about an axis tangential to it, is
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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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4
Effect of a force on a body depends upon
C. Position or line of action
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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
D. T.ω/4500 (in kilowatts)
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The resolved part of the resultant of two forces inclined at an angle θ in a given direction is equal to
A. The algebraic sum of the resolved parts of the forces in the given direction
B. The sum of the resolved parts of the forces in the given direction
C. The difference of the forces multiplied by the cosine of θ
D. The sum of the forces multiplied by the sine of θ
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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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Dynamic friction as compared to static friction is
D. May be less of more depending on nature of surfaces and velocity
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In a framed structure, as shown in the below figure, the force in the member BC is
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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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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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If a body is acted upon by a number of coplanar non-concurrent forces, it may
A. Rotate about itself without moving
B. Move in any one direction rotating about itself
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A particle inside a hollow sphere of radius r, having coefficient of friction μ can rest up to height of
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The unit of power in S.I. units is
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The maximum acceleration of a particle moving with simple harmonic motion is
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The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction.)
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The resultant of two equal forces P making an angle θ, is given by
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The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
D. Coefficient of friction
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When the spring of a watch is wound, it will possess
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If n = number of members and y = number of joints, then for a perfect frame, n = ?
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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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A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t² (t - 4), the acceleration of the particle will be given by the equation
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Coefficient of friction is the
A. Angle between normal reaction and the resultant of normal reaction and the 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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The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is
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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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Which of the following are vector quantities?
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The unit of moment of inertia of an area is
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A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie
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The bodies which rebound after impact are called
C. Neither elastic nor inelastic bodies
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The range of projectile (R) on an upward inclined plane is
A. g. cos² β/2u². sin (α + β). cos α
B. 2u². sin (α + β). cos α/g. cos² β
C. g. cos² β/2u². sin (α - β). cos α
D. 2u². sin (α - β). cos α/g. cos² β