Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 29

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From a uniform square plate of side $a$ and mass $m,$ a square portion $D E F G$ of side $\frac{a}{2}$ is removed. Then, the moment of inertia of remaining portion about the axis $A B$ is

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Important Questions on Rotation

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 30

A semicircular $2$ -dimensional plate of mass $m$ has radius $r$ and centre $C .$ Its centre of mass is at a distance $x$ from $C .$ Its moment of inertia about an axis through its centre of mass and perpendicular to its plane is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 31

Two point masses

m_{1}

and

m_{2}

are attached from two ends of a rod of negligible mass. The system is rotated about an axis perpendicular to the length of the rod. The minimum moment of inertia of the system is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 32

The ratio of the radii of gyration of a circular disc and a circular ring of the same radius about a tangential axis in the plane is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 33

If a person standing on a rotating disc stretches out his hands, the angular speed will

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 34

The angular momentum of a system of particles is conserved

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 35

Angular momentum is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 36

If the radius of the earth contracts

\frac{1}{n}

of its present day value, the length of the day will be approximately

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Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 9 - Rotation>Objective Problems>Q 37

A thin circular ring of mass

M

and radius

R

is rotating about its axis with a constant angular velocity

ω .

Two objects each of mass

m

are attached gently to the ring. The wheel now rotates with an angular velocity