Q. On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts

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Q. The acceleration of a particle moving along the circumference of a circle with a uniform speed, is directed

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Q. From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through

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Q. A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is

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Q. Kinetic friction may be defined as

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Q. ω rad/sec is the angular velocity of a crank whose radius is r. If it makes θ° with inner dead centre and obliquity of the connecting rod l is φ, the velocity v of the piston, is given by the equation

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Q. According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on

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Q. A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be

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Q. If two forces each equal to T in magnitude act at right angles, their effect may be neutralised by a third force acting along their bisector in opposite direction whose magnitude will be

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Q. Energy may be defined as

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Q. The intrinsic equation of catenary is

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Q. A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight

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Q. Angular acceleration of a particle may be expressed as

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Q. A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

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Q. A stone is whirled in a vertical circle, the tension in the string, is maximum

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Q. Periodic time of body moving with simple harmonic motion, is

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Q. On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts

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Q. The centre of gravity of a plane lamina will not be at its geometrical centre if it is a

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Q. The motion of a bicycle wheel is

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Q. The displacement of a particle which moves along a straight line is given by S = 4t³ + 3t² - 10 where S is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is

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