MEDIUM
JEE Main/Advance
IMPORTANT
Earn 100

A system of particles has its centre of mass at the origin. The of all the particles
(a)may be positive
(b)may be negative
(c)may be non-negative
(d)may be non-positive

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Important Questions on Centre of Mass, Momentum and Collisions
MEDIUM
JEE Main/Advance
IMPORTANT
In which of the following cases the centre of mass of a system is certainly not at its centre ?

EASY
JEE Main/Advance
IMPORTANT
If the net external force acting on a system is zero, then the centre of mass

EASY
JEE Main/Advance
IMPORTANT
In an elastic collision in absence of external force, which of the following is/are correct?

EASY
JEE Main/Advance
IMPORTANT
A small ball collides with a heavy ball initially at rest. In the absence of any external impulsive force,

MEDIUM
JEE Main/Advance
IMPORTANT
A block moving in air explodes in two parts. Then, just after the explosion (neglect change in momentum due to gravity)

EASY
JEE Main/Advance
IMPORTANT
Two bodies of the same masses collide head-on elastically, then

EASY
JEE Main/Advance
IMPORTANT
External force acts on a system of particles. The velocity and the acceleration of the centre of mass are found to beand at an instant, then it is possible that

EASY
JEE Main/Advance
IMPORTANT
A bag of mass hangs by a long thread, and a bullet (mass ) comes horizontally with velocity and gets caught in the bag. Then for the combined system (bag and bullet) is
