Q. A lifting machine lifts a load of 1000N through a distance of 0.2 m by means of an effort of 200N through a distance of 1m. This machine is an ideal one.

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Q. 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.)

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Q. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.

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Q. The acceleration of a particle moving with simple harmonic motion is proportional to the displacement of the particle from the mean position.

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Q. The unit of moment of inertia of an area is

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Q. A pendulum which executes one beat per second is known as

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Q. D' Alembert's principle basically depends upon Newton's second law of motion.

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Q. The forces, whose lines of action are parallel to each other and act in the same directions, are known as

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Q. A number of forces acting at a point will be in equilibrium, if

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Q. The kinetic energy of a body __________ upon its mass and velocity.

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Q. According to Newton's first law of motion,

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Q. The moment of inertia of a square of side (a) about an axis through its centre of gravity is

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Q. The velocity ratio of a single purchase crab winch can be increased by

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Q. The motion of a wheel of a car is

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Q. For any system of coplaner forces, the condition of equilibrium is that the

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Q. The ratio of static friction to dynamic friction is always

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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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