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qUESTIONS

MCQs-PYQs-12th-jee

Radius of gyration of her body depends upon

MCQs-PYQs-12th-jee

A circular disc is to be made by using iron and aluminium, so that it acquires maximum moment of inertia about its geometrical axis. It is possible with

MCQs-PYQs-12th-jee

Five particles of Mars 2 kg are attached to a rim of a circular disc of radius. 0.1m and negligible mass. Moment of inertia of the system about the axis passing through the centre of the disc and the particular to its plane is

MCQs-PYQs-12th-jee

The latest rotates with uniform angular velocity, which of the following is not true

MCQs-PYQs-12th-jee

A wheel turning with angular speed of 30 rev/s, is brought to rest with a constant acceleration. It turns 60 rev before it stops the time that elapses before it stops is

MCQs-PYQs-12th-jee

The rotors velocity of a helicopter engine changes from 330 rev/min to 110 rev/min in 2 min. How long does the rotor blades take to stop?

MCQs-PYQs-12th-jee

The car is moving at a speed of 72km/h and the radius of the wheels is 0.25 m. If the wheels are starting twenty rotations by applying brakes the angular retardation produced by the brakes is

MCQs-PYQs-12th-jee

A point P on the rim of a way this initially addressed and in contact with the ground. Find the displacement of the point P if the radius of the wheel is 5m and the wheel rolls forward through half revolution

MCQs-PYQs-12th-jee

A cyclist starts from centre O of a circular park of radius 1 km and moves along the path OPRQO as shown in figure. If he maintains constant speed of 10 m s-1, what is his acceleration at point R?

MCQs-PYQs-12th-jee

A particle is moving on a circular path of radius r with uniform speed v. What is the displacement of the particle after it has described an angle of ?

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