AIPMT 2003 | Rotational Motion Question 79 | Physics

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

$${{{K^2} + {R^2}} \over {{R^2}}}$$

$${{{K^2}} \over {{R^2}}}$$

$${{{K^2}} \over {{K^2} + {R^2}}}$$

$${{{R^2}} \over {{K^2} + {R^2}}}$$

AIPMT 2002

MCQ (Single Correct Answer)

-1

A point P consider at contact point of a wheel on ground which rolls on ground without slipping then value of displacement of point P when wheel completes half of rotation (if radius of wheel is 1 m)

2 m

$$\sqrt {{\pi ^2} + 4} m$$

$$\pi \,m$$

$$\sqrt {{\pi ^2} + 2} \,m$$

AIPMT 2002

MCQ (Single Correct Answer)

-1

A circular disc is to be made by using iron and aluminium so that it acquired maximum moment of inertia about geometrical axis. It is possible with

aluminium at interior and iron surround to it

iron at interior and aluminium surround to it

using iron and aluminium layers in alternate order

sheet of iron is used at both external surface and aluminium sheet as internal layers.

AIPMT 2002

MCQ (Single Correct Answer)

-1

A disc is rotating with angular speed $$\omega $$. If a child sits on it, what is conserved

linear momentum

angular momentum

kinetic energy

potential energy.

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