Class 11PhysicsSystem of Particles and Rotational MotionEffect of Internal and External Force on Centre of Mass
EasyTwo spheres of masses $2M$ and $M$ are initially at rest at a distance $R$ apart. Due to mutual force of attraction,they approach each other. When they are at separation $R/2$,the acceleration of the centre of mass of the system would be .......
- A$0\,m/s^2$
- B$g\,m/s^2$
- C$3g\,m/s^2$
- D$12g\,m/s^2$
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If a force $10 \hat{i} + 15 \hat{j} + 25 \hat{k}$ acts on a system and gives an acceleration $2 \hat{i} + 3 \hat{j} - 5 \hat{k}$ to the centre of mass of the system,the mass of the system is
Medium
View Solution$Assertion$ : If no external force acts on a system of particles,then the centre of mass will not move in any direction.
$Reason$ : If net external force is zero,then the linear momentum of the system changes.
$Reason$ : If net external force is zero,then the linear momentum of the system changes.
Which types of forces act on a system of particles?
Easy
View SolutionAssertion $(A):$ If there is no external torque on a body about its centre of mass,then the velocity of the centre of mass remains constant.
Reason $(R):$ The linear momentum of an isolated system remains constant.
Reason $(R):$ The linear momentum of an isolated system remains constant.
Medium
View SolutionTwo spheres of masses $2M$ and $M$ are initially at rest at a distance $R$ apart. Due to mutual force of attraction,they approach each other. When they are at a separation $R/2$,the acceleration of the centre of mass of the system would be ....... $m/s^2$.
Medium
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