Question
The velocity of centre of mass of the system remains constant, if the total external force acting on thesystem is (b) maximum(a) minimum(c) unity(d) $\mathrm{zero}$
Step 1
Mathematically, we can write this as $v_{cm} = k$, where $k$ is a constant. Show more…
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Key Concepts
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If the net external force acting on the system of particles is zero, then which of the following may vary? (a) Momentum of the system (b) Kinetic energy of the system (c) Velocity of centre of mass (d) Position of centre of mass
If the resultant force on a system of particles is non-zero, then: (a) the linear momentum of the system must increase. (b) the velocity of the centre of mass of the system must change. (c) the distance of the centre of mass may remain constant from a fixed point. (d) kinetic energy of all particles must either increase simultaneuosly or decrease simultaneously.
Center of Mass and Collision
Section B
If the external forces acting on a system have a zero resultant, the centre of mass (a) must not move (b) may move (c) must not accelerate (d) may accelerate
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