JEE Main 2021 (Online) 26th February Morning Shift | Rotational Motion Question 60 | Physics

JEE Main 2021 (Online) 26th February Morning Shift

MCQ (Single Correct Answer)

-1

Four identical solid spheres each of mass 'm' and radius 'a' are placed with their centres on the four corners of a square of side 'b'. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is :

$${4 \over 5}m{a^2}$$

$${8 \over 5}m{a^2} + m{b^2}$$

$${4 \over 5}m{a^2} + 2m{b^2}$$

$${8 \over 5}m{a^2} + 2m{b^2}$$

JEE Main 2021 (Online) 26th February Morning Shift

MCQ (Single Correct Answer)

-1

A particle is moving with uniform speed along the circumference of a circle of radius R under the action of a central fictitious force F which is inversely proportional to R³. Its time period of revolution will be given by :

$$T \propto {R^{{4 \over 3}}}$$

$$T \propto {R^{{5 \over 2}}}$$

$$T \propto {R^{{3 \over 2}}}$$

$$T \propto {R^2}$$

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

A sphere of radius 'a' and mass 'm' rolls along a horizontal plane with constant speed v₀. It encounters an inclined plane at angle $$\theta$$ and climbs upward. Assuming that it rolls without slipping, how far up the sphere will travel?

JEE Main 2021 (Online) 25th February Evening Shift Physics - Rotational Motion Question 62 English

JEE Main 2021 (Online) 25th February Evening Shift Physics - Rotational Motion Question 62 English

$${{v_0^2} \over {2g\sin \theta }}$$

$${{7v_0^2} \over {10g\sin \theta }}$$

$${2 \over 5}{{v_0^2} \over {g\sin \theta }}$$

$${{v_0^2} \over {5g\sin \theta }}$$

JEE Main 2021 (Online) 24th February Evening Slot

MCQ (Single Correct Answer)

-1

A circular hole of radius $$\left( {{a \over 2}} \right)$$ is cut out of a circular disc of radius 'a' as shown in figure. The centroid of the remaining circular portion with respect to point 'O' will be :

JEE Main 2021 (Online) 24th February Evening Slot Physics - Rotational Motion Question 63 English