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qUESTIONS

MCQs-PYQs-12th-jee

A car is moving on a circular track of radius R. The road is banked at θ. μ is the coefficient of friction. Find the maximum speed the car can have.

MCQs-PYQs-12th-jee

A stone of mass m is tied to a string and is moved in a vertical circle of radius r making n revolutions per minute. The total tension in the string when the stone is at its lowest point is

Rotational Dynamics

A particle of mass is moving in a circular path of constant radius such that its centripetal acceleration is varying with time as , where is a constant. The power delivered to the particle by the forces acting on it is

MCQs-PYQs-12th-jee

The kinetic energy k of a particle moving along a circle of radius depends on the distance covered. It is given as K.E. = as2 where is a constant. The force acting on the particle is

MCQs-PYQs-12th-jee

A particle of mass M moves with constant speed along a circular path of radius r under the action of a force F. Its speed is

MCQs-PYQs-12th-jee

Two masses and M are connected by a light string that passes through a smooth hole O at the centre of a table. Mass lies on the table and M hangs vertically. is moved round in a horizontal circle with O as the centre. If is the length of the string from O to then the frequency with which should revolve so that M remains stationary is

MCQs-PYQs-12th-jee

A stone is rotated steadily in a horizontal circle with a period T by a string of length l. If the tension in the string is kept constant and l increases by 1%, what is the percentage change in T

MCQs-PYQs-12th-jee

The length of the second hand of a watch is 1 cm. The velocity vector of the tip of the second hand in cm per second is –

MCQs-PYQs-12th-jee

The magnitude of displacement of a particle moving in a circle of radius a with constant angular speed ω varies with time t as –

MCQs-PYQs-12th-jee

A stone hanging from a massless string of length 15 m is projected horizontally with speed 147 m/s. Then the speed of the particle at the point where tension in string equals the weight of particle is –

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