Q. The rate of change of displacement of a body is called

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Q. The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.)

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Q. The periodic time (T) is given by(where ω = Angular velocity of particle in rad / s.)

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Q. 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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Q. The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.

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Q. The range of projectile(R) on an upward inclined plane is

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Q. 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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Q. In actual machines, mechanical advantage is __________ velocity ratio.

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Q. The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

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Q. A non-reversible machine is also called a self-locking machine.

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Q. Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point

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Q. The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.

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Q. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

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Q. The resultant of two equal forces P making an angle θ, is given by

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Q. The force, by which the body is attracted, towards the centre of the earth, is called

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Q. Coplaner concurrent forces are those forces which

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Q. 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

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Q. When two elastic bodies collide with each other,

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Q. The centre of gravity of a triangle lies at a point where its medians intersect each other.

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Q. In order to double the period of simple pendulum, the length of the string should be

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