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qUESTIONS

MCQs-PYQs-12th-jee

The total kinetic energy of a rolling sphere having translational velocity is

MCQs-PYQs-12th-jee

An object is rolling without slipping on a horizontal surface and its rotational kinetic energy is two-third of translational kinetic energy. The body is

MCQs-PYQs-12th-jee

Two bodies have their moments of inertia l and 2l respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular velocity will be in the ratio

MCQs-PYQs-12th-jee

An automobile engine develops 100 kilo−watt, when rotating at a speed of 1800rev/min. Find the torque developed by it.

MCQs-PYQs-12th-jee

The moment of inertia of a body about a given axis is 1.2 kg m2. · Initially, the body is at rest. In order to produce a rotational kinetic energy of 1500 J, an angular acceleration of 25 rad/s2 must be applied about that axis for a duration of

MCQs-PYQs-12th-jee

A solid spherical ball rolls on an inclined plane without slipping. The ratio of rotational and total energy is

MCQs-PYQs-12th-jee

A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K, If radius of the ball be R, then the fraction of total energy associated with its rotational energy will be

MCQs-PYQs-12th-jee

A round disc of moment of inertia I2 about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I1 rotating with an angular velocity ω about the same axis. The final angular velocity of the combination of discs is.

MCQs-PYQs-12th-jee

A small mass attached to a string rotates on a frictionless table top as shown in Fig. If the tension in the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will

MCQs-PYQs-12th-jee

When a man stands on a turn-table stretching with two equal loads in hand and rotates. Then he folds his arm. Which of the following statements is correct?

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