JEE Main 2020 (Online) 6th September Evening Slot | Rotational Motion Question 68 | Physics

JEE Main 2020 (Online) 6th September Evening Slot

Numerical

-0

The centre of mass of solid hemisphere of radius 8 cm is x from the centre of the flat surface. Then value of x is __________.

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JEE Main 2020 (Online) 5th September Morning Slot

Numerical

-0

A force $$\overrightarrow F = \left( {\widehat i + 2\widehat j + 3\widehat k} \right)$$ N acts at a point
$$\left( {4\widehat i + 3\widehat j - \widehat k} \right)$$ m. Then the magnitude of torque
about the point $$\left( {\widehat i + 2\widehat j + \widehat k} \right)$$ m will be $$\sqrt x $$ N m.
The value of x is _______.

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JEE Main 2020 (Online) 4th September Morning Slot

Numerical

-0

A circular disc of mass M and radius R is rotating about its axis with angular speed $${\omega _1}$$ . If another stationary disc having radius $${R \over 2}$$ and same mass M is droped co-axially on to the rotating disc. Gradually both discs attain constant angular speed $${\omega _2}$$ the energy lost in the process is p% of the initial energy. Value of p is __________.

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JEE Main 2020 (Online) 3rd September Evening Slot

Numerical

-0

An massless equilateral triangle EFG of side ‘a’ (As shown in figure) has three particles of mass m situated at its vertices. The moment of inertia of the system about the line EX perpendicular to EG in the plane of EFG is $${N \over {20}}$$ ma² where N is an integer. The value of N is _____. JEE Main 2020 (Online) 3rd September Evening Slot Physics - Rotational Motion Question 80 English