1

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

+4

-1

Moment of inertia of a square plate of side l about the axis passing through one of the corner and perpendicular to the plane of square plate is given by :

2

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

+4

-1

A particle of mass m is suspended from a ceiling through a string of length L. The particle moves in a horizontal circle of radius r such that $$r = {L \over {\sqrt 2 }}$$. The speed of particle will be :

3

JEE Main 2021 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

List-I | List-II |
---|---|

(a) MI of the rod (length L, Mass M, about an axis $$ \bot $$ to the rod passing through the midpoint) | (i) $$8M{L^2}/3$$ |

(b) MI of the rod (length L, Mass 2M, about an axis $$ \bot $$ to the rod passing through one of its end) | (ii) $$M{L^2}/3$$ |

(c) MI of the rod (length 2L, Mass M, about an axis $$ \bot $$ to the rod passing through its midpoint) | (iii) $$M{L^2}/12$$ |

(d) MI of the rod (Length 2L, Mass 2M, about an axis $$ \bot $$ to the rod passing through one of its end) | (iv) $$2M{L^2}/3$$ |

Choose the correct answer from the options given below:

4

JEE Main 2021 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Three objects A, B and C are kept in a straight line on a frictionless horizontal surface. The masses of A, B and C are m, 2m and 2m respectively. A moves towards B with a speed of 9 m/s and makes an elastic collision with it. Thereafter B makes a completely inelastic collision with C. All motions occur along same straight line. The final speed of C is :

Questions Asked from Center of Mass and Collision (MCQ (Single Correct Answer))

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