1

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

A uniform rectangular thin sheet ABCD of
mass M has length a and breadth b, as shown
in the figure. If the shaded portion HBGO is
cut-off, the coordinates of the centre of mass
of the remaining portion will be :-

2

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

A body of mass m

_{1}moving with an unknown velocity of $${v_1}\mathop i\limits^ \wedge $$, undergoes a collinear collision with a body of mass m_{2}moving with a velocity $${v_2}\mathop i\limits^ \wedge $$ . After collision, m_{1}and m_{2}move with velocities of $${v_3}\mathop i\limits^ \wedge $$ and $${v_4}\mathop i\limits^ \wedge $$ , respectively. If m_{2}= 0.5 m_{1}and v_{3}= 0.5 v_{1}, then v_{1}is :-3

JEE Main 2019 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

Four particles A, B, C and D with masses
m

_{A}= m, m_{B}= 2m, m_{C}= 3m and m_{D}= 4m are at the corners of a square. They have accelerations of equal magnitude with directions as shown. The acceleration of the centre of mass of the particles is :4

JEE Main 2019 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

If 10

^{22}gas molecules each of mass 10^{–26}kg collide with a surface (perpendicular to it) elastically per second over an area 1 m^{2}with a speed 10^{4}m/s, the pressure exerted by the gas molecules will be of the order of :Questions Asked from Center of Mass and Collision (MCQ (Single Correct Answer))

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