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Rotational Work and Energy

The resultant...

Question

The resultant force on a system of particles is non -zero.

A

The linear momentum of mass of the system must increase.

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B

The velocity of the centre of mass of the system must change.

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C

The distance of the centre of mass remains constant from a fixed point

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D

Kinetic energy of all particles must either increases simultaneously or decreases simultaneously.

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Solution

The correct options are
A The linear momentum of mass of the system must increase.
B The velocity of the centre of mass of the system must change.
D Kinetic energy of all particles must either increases simultaneously or decreases simultaneously.

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Similar questions

Q. The kinetic energy force on the particle continuously increases with time.
(a) The resultant force on the particle must be parallel to the velocity at all instants.
(b) The resultant force on the particle must be at an angle less than 90° all the time.
(c) Its height above the ground level must continuously decrease.
(d) The magnitude of its linear momentum is increasing continuously.

Q. 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.

Q. Statement 1: If no external force acts on a system of particles, then the centre of mass will not move in any direction
Statement 2: If net external force is zero, then the linear momentum of the system remains constant.

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m_{1}

m_{2}

, the first particle is pushed towards the centre of mass through a distance d, the distance through which second particle must be moved to keep the centre of mass at the same position is

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lying on the same straight line. If mass

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