1

JEE Main 2020 (Online) 2nd September Evening Slot

Numerical

+4

-0

A particle of mass m is moving along the x-axis
with initial velocity $$u\widehat i$$. It collides elastically
with a particle of mass 10 m at rest and then
moves with half its initial kinetic energy (see
figure). If $$\sin {\theta _1} = \sqrt n \sin {\theta _2}$$ then value of n is
________.

Your input ____

2

JEE Main 2020 (Online) 2nd September Evening Slot

Numerical

+4

-0

A square shaped hole of side l = $${a \over 2}$$ is carved
out at a distance d = $${a \over 2}$$ from the centre ‘O’ of
a uniform circular disk of radius a. If the
distance of the centre of mass of the
remaining portion form O is
$$ - {a \over X}$$ , value of X (to
the nearest integer) is :

Your input ____

3

JEE Main 2020 (Online) 8th January Morning Slot

Numerical

+4

-0

A body A, of mass m = 0.1 kg has an initial
velocity of 3$$\widehat i$$ ms

^{-1}. It collides elastically with another body, B of the same mass which has an initial velocity of 5$$\widehat j$$ ms^{-1}. After collision, A moves with a velocity $$\overrightarrow v = 4\left( {\widehat i + \widehat j} \right)$$. The energy of B after collision is written as $${x \over {10}}$$. The value of x is ___________.Your input ____

Questions Asked from Center of Mass and Collision (Numerical)

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