Which of the following conditions is necessary for the motion of centre of mass to be uniform?

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Questions Match

1. Which of the following conditions is necessary for the motion of centre of mass to be uniform?

1. All internal forces cancel2. Friction is present3. Total external force is zero4. System is rigid

2. Which of the following does not affect the location of the centre of mass of a rigid body?

1. Distribution of mass2. Shape of the body3. External forces4. Density variation

3. Which of the following statements is true regarding the motion of centre of mass?

1. It is affected by internal forces only2. It follows Newton’s second law with external forces3. It depends on individual particle accelerations4. It oscillates if one particle oscillates

4. Which of the following systems will have a moving centre of mass?

1. Two ice skaters pushing each other on frictionless ice2. Explosion of a stationary firecracker in air3. Ball falling freely under gravity4. A rotating ceiling fan

5. Which of the following statements is true regarding internal forces in a system?

1. They change the velocity of COM2. They cause rotation of COM3. They cannot change total linear momentum4. They change mass of the system

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Which of the following conditions is necessary for the motion of centre of mass to be uniform?