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6. system of particles and rotational motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics6. system of particles and rotational motion1 Mark
MCQ
Two blocks $A$ and $B$ are joined together with a compressed spring. When the system is released, the two blocks appear to be moving with unequal speeds in opposite directions as shown in figure. Select the correct statement
  • ✓
    The centre of mass of the system will remain stationary
  • B
    Mass of block $A$ is equal to that of block $B$
  • C
    The centre of mass of the system will move towards right.
  • D
    It is an impossible physical situation
✓

Answer

Correct option: A.
The centre of mass of the system will remain stationary
a
As net force on the system $= 0$ (after being released) So centre of mass of the system remains stationary

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