Q. A science teacher claimed that Newton's third law of motion is involved while studying the motion of rockets. His statement is

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Q. One kg force is equal to

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Q. Coefficient of friction depends upon

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Q. Which of the following statement is correct?

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Q. 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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Q. 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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Q. The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s², is

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Q. The motion of the body from one extremity to the other is known as a beat.

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Q. The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.

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Q. A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

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Q. Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces.

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Q. All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.

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Q. The time of flight of a projectile on downward inclined plane depends upon

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Q. The below 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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Q. The moment of the force P about O as shown in the below figure is

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Q. Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __________ than that about X-X axis.

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Q. 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.)

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Q. Two bodies of masses m1,and m2 are hung from the ends of a rope, passing oyer a frictionless pulley as shown in the figure below. The acceleration of the string will be

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Q. 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

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Q. The centre of gravity of a trapezium with parallel sides a and b lies at a distance of y from the base b, as shown in the below figure. The value of y is

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