Related Questions
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The resultant of two equal forces P making an angle θ, is given by
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The term 'Centroid' is
A. The same as centre of gravity
B. The point of suspension
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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Forces are called concurrent when their lines of action meet in
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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 bellow figure shows the two equal forces at right angles acting at a point. The value of force R acting along their bisector and in opposite direction is
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The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is
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If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
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A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
D. m1. m2.g (1 + sin α)/(m1 + m2)
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When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is
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Which of the following are vector quantities?
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Which of the following statement is correct?
A. The algebraic sum of the forces, constituting the couple is zero
B. The algebraic sum of the forces, constituting the couple, about any point is the same
C. A couple cannot be balanced by a single force but can be balanced only by a couple of opposite sense
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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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A body will begin to move down an inclined plane if the angle of inclination of the plane is _________ the angle of friction.
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The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)
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If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
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The range of a projectile is maximum, when the angle of projection is
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The coefficient of friction depends upon
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In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively
A. √3. W (tensile) and 2W (compressive)
B. 2W (tensile) and √3. W (compressive)
C. 2√3. W (tensile) and 2√3. W (compressive)
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A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is μ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
B. Slant up towards direction of pull
C. Slant down towards direction of pull
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The C.G. of a solid hemisphere lies on the central radius 3r
A. At distance from the plane base 3r
B. At distance from the plane base 3r
C. At distance from the plane base 3r
D. At distance from the plane base
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The static friction
A. Bears a constant ratio to the normal reaction between the two surfaces
B. Is independent of the area of contact, between the two surfaces
C. Always acts in a direction, opposite to that in which the body tends to move
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Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
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When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
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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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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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The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction.)
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The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is
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Effect of a force on a body depends upon
C. Position or line of action
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Angle 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 ratio of minimum friction force to the friction force acting when the body is just about to move
D. The ratio of minimum friction force to friction force acting when the body is in motion
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The total motion possessed by a body, is called