Back to SYSTEM OF PARTICLES

NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

1 Medium

1 of 1

Analyzing +4 | -1

Statement-1: If the centre of mass of a system is the origin then the total mass to the right of origin is same as total mass to left of origin.
Statement-2:

x_{\mathrm{cm}}=\frac{\Sigma_{m_i x_i}}{\Sigma_{m_i}}

View answer and explanation

Correct option: D

Statement-1 is false, Statement-2 is true

Option D (Statement-1 is false, Statement-2 is true) is correct because Statement-1 is only true if the origin is the center of mass and the masses are distributed symmetrically, and Statement-2 is the correct formula for the center of mass.

More Questions from SYSTEM OF PARTICLES

Practice All Chapter MCQs →

Moment of inertia of a hollow cylinder of mass M and radius r about its own axis is Two particles of mass

{m_1}

{m_2}\,({m_1} > {m_2})

attract each other with a force inversely proportional to the square of the distance between them. If the particles are initially held at rest and then released, the centre of mass will The wheel of toy car rotates about axis. It slows down from 400 rps to 200 rps in 2s. Then its angular retardation in

\mathrm{rad}{\mathrm{s}^{ - 2}}

is When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration) A particle of mass

m

is projected with a velocity '

u

' making an angle of

30^{\circ}

with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height

h

is: The time period of the second’s hand of a watch is