If the resultant of all external forces is zero, then velocity of centre of mass will be
zero
constant
either $(a)$ or $(b)$
neither $(a)$ nor $(b)$

Question

If the resultant of all external forces is zero- then velocity of centre of mass will bezeroconstanteither -a- or -b-neither -a- nor -b-

Toppr Admin · Accepted Answer

The correct option is B constantFexternal-MaCM -xA0- where M is the total mass-Zero net external force implies that aCM-0Thus -xA0- VCM-constant -xA0-OR zero-If the system is at rest initially- -xA0-then VCM-0-

If the resultant of all external forces is zero, then velocity of centre of mass will bezeroconstanteither (a) or (b)neither (a) nor (b)

The correct option is B constantFexternal=MaCM where M is the total mass.Zero net external force implies that aCM=0Thus VCM=constant OR zero(If the system is at rest initially, then VCM=0)

If the resultant of all external forces is zero, then velocity of centre of mass will be
zero
constant
either $(a)$ or $(b)$
neither $(a)$ nor $(b)$

The correct option is B constant
$F_{e x t e r n a l} = M a_{C M}$ where M is the total mass.
Zero net external force implies that $a_{C M} = 0$
Thus $V_{C M} = c o n s t a n t$ OR zero
(If the system is at rest initially, then $V_{C M} = 0$ )