Rotational Motion (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 2 of 14

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Question number: 1

» Rotational Motion » Conservation of Angular Momentum

Appeared in Year: 2012

MCQ▾

Question

A planet orbits in an elliptical path of eccentricity e around a massive star considered fixed at one of the foci. The point in space where it is closest to the star is denoted by P and the point where it is farthest is denoted by A. Let VP and VA are be the respective speeds at P and A. Then –

A planet orbit in an elliptical path

A Planet Orbit in an Elliptical Path

In figure a planet orbits in an elliptical path of eccentricity e around a massive star consideration fixed at one of the foci.

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Choice (4) Response

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Question number: 2

» Rotational Motion » Moment of Inertia

Appeared in Year: 2012

MCQ▾

Question

Seven identical coins are rigidly arranged on a flat table in the pattern shown below so that each coin touches its neighbors. Each coin is a thin disc of mass m and radius r. Note that the moment of inertia of an individual coin about an axis passing through center and perpendicular to the plane of the coin is.

Arrangement of seven identical coins

Arrangement of Seven Identical Coins

In figure seven identical coins are rigidly arranged on a flat table in the pattern such that each coin touches its neighbors.

The moment of inertia of the system of seven coins about an axis that passes through the point P (the centre of the coin positioned directly to the right of the central coin) and perpendicular to the plane of the coins is-

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Choice (4) Response

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c.

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