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Rotational Motion — BITSAT Physics PYQs

26 previous year questions from Rotational Motion with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

Rotational Motion — BITSAT Physics PYQs

The moment of inertia of a cube of mass m and side a about one of its edges is equal to

The torque of a force 5 i +3 j -7 k about the origin is . If the force acts on a particle whose position vector is 2 i +2 j + k , then the value of will be :

A disc is rolling without slipping on a surface. The radius of the disc is R . At t=0 , the top most point on the disc is A as shown in figure. When the disc completes half of its

Four holes of radius 5 ~cm are cut from a thin square plate of 20 ~cm and mass 1 ~kg . The moment of inertia of the remaining portion about Z -axis is

A solid sphere of 80 ~kg and radius 15 ~m moving in a space becomes a circular disc of radius 20 ~m in 1 ~h . The rate of change of moment of Inertia in this process is

A round disc of moment of inertia I ₂ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I ₁ rotating with an

Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle A B C of side ~cm (as shown in the figure). The moment of inertia of the system about

A solid cylinder and a hollow cylinder both of the same mass and same external diameter are released from the same height at the same time on an inclined plane. Both roll down with

M.I of a circular loop of radius R about the axis in figure is

A semicircular disc of mass M and radius R is free to rotate about its diameter. The moment of inertia of semicircular disc about a line perpendicular to its plane through centre i

A uniform solid cylindrical roller of mass m is being pulled on horizontal surface with force F parallel to the surface applied at its centre. If the acceleration of the cylinder i

A cylinder of mass 2 kg is released from rest from the top of an inclined plane of inclination 30 &#176; and length 1 m . If the cylinder rolls without slipping, then its speed whe

If the time period is doubled, then the angular momentum of the body will (provided the moment of inertia of the body is constant)

A pulley of radius 2 m is rotated about its axis by a force = 20 t - 5 t 2 newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley abou

A uniform rod of length l and mass m is free to rotate in a vertical plane about A . The rod initially in horizontal position is released. The initial angular acceleration of the r

A circular disc of radius R and thickness R 6 has moment inertia I about an axis passing through its centre perpendicular to its plane. It is melted and recasted into a solid spher

A square gate of size 1 ~m 1 ~m is hinged at its mid-point. A fluid of density fills the space to the left of the gate. The force F required to hold the gate stationary is

A thin rod of length 41 and mass 4 ~m is bent at the points as shown in figure. What is the moment of inertia of the rod about the axis passes through point O and perpendicular to

An equilateral prism of mass m rests on a rough horizontal surface with coefficient of friction . A horizontal force F is applied on the prism as shown in the figure. If the coeffi

Two rings of radius R and nR made of same material have the ratio of moment of inertia about an axis passing through centre is 1: 8 . The value of n is

A particle of mass ' m ' is projected with a velocity v making an angle of 30^ with the horizontal. The magnitude of angular momentum of the projectile about the point of projectio

A disc is performing pure rolling on a smooth stationary surface with constant angular velocity as shown in figure. At any instant, for the lower most point of the disc -

What is the moment of inertia of a solid sphere of density and radius R about its diameter?

A constant torque of 31.4 ~N - m is exerted on a pivoted wheel. If angular acceleration of wheel is 4 rad / s ², then the moment of inertia of the wheel is

The ratio of the accelerations for a solid sphere (mass 'm' and radius 'R') rolling down an incline of angle ' ' without slipping and slipping down the incline without rolling is:

A uniform cube of side a and mass m rests on a rough horizontal table. A horizontal force F is applied normal to one of the faces at a point that is directly above the centre of th

A cylinder of mass 2 kg is released from rest from the top of an inclined plane of inclination 30 ° and length 1 m . If the cylinder rolls without slipping, then its speed whe