Table of Contents

- 1 What does it mean when the initial velocity is 0?
- 2 Why is velocity of center of mass zero?
- 3 Can initial velocity be more than 0?
- 4 Can a velocity of centre of mass be zero?
- 5 How does velocity affect center of mass?
- 6 How do you find the velocity of mass center?
- 7 What happens to the center of mass when the Net Force Zero?
- 8 What happens to the center of mass when the system moves?

## What does it mean when the initial velocity is 0?

When a body starts from rest or it changes it direction of motion,it is called as initial velocity. We generally consider initial velocity is equal to zero(u=0),only when the object starts from rest. Generally at time (t=0),the initial velocity is zero.

### Why is velocity of center of mass zero?

Since they move due to the mutual interaction between two objects so, the centre of mass remains the same and its velocity is zero.

**In which situation centre of mass has no acceleration?**

If the net (external) force on a system of particles is zero, the center of mass of the system will not accelerate (Newton’s First Law applied to the center of mass. The system behaves as if all of its mass were located at the system’s center of mass.

**How do you find the acceleration from the center of mass?**

The acceleration of centre of mass could be easily calculated using ∑Fnet=mTacom, where Fnet is the net external force on the system and mT is the total mass of the system. Hence the net acceleration of the centre of mass of the system is −2/3 ms−2.

## Can initial velocity be more than 0?

Initial velocity can be greater than zero because whenever we talk about motion we have a starting time and an ending time. When the body is in motion before the time started, the body can have an initial velocity greater than zero.

### Can a velocity of centre of mass be zero?

If the velocity of centre of mass of a system is zero then the kinetic energy of the system may be greater than zero.

**What is the velocity of the center of mass of the system?**

The center of mass velocity is the sum of each mass’s momentum divided by the total mass of the system.

**Does center of mass affect acceleration?**

The center of mass of the system only accelerates, if external forces are acting on the system. If only internal forces are acting on the particles that make up the system, then the center of mass does not accelerate, its velocity remains constant.

## How does velocity affect center of mass?

Center of Mass Velocity Velocity is the change in position of an object over time. When the system of particles is moving, the center of mass moves along with it. The center of mass velocity equation is the sum of each particle’s momentum (mass times velocity) divided by the total mass of the system.

### How do you find the velocity of mass center?

**What is the definition of center of mass velocity?**

Center of Mass Velocity. Velocity is the change in position of an object over time. The center of mass is the location of particles within a system where the total mass of the system can be considered to be concentrated.

**What is the acceleration of the center of mass of particles?**

A = is the acceleration of centre of mass of system of particles. The force of particle is given by F So, MA = F 1 + F 2 +….+ F n which is the sum of all external forces acting on the particles of the system. This is how we determine the velocity and acceleration of the centre of mass of the system of particles.

## What happens to the center of mass when the Net Force Zero?

If the net external force is zero, then the acceleration of the center of mass is zero, and the velocity of the center of mass is constant. As a result, the position of the center of mass of the system will follow a straight line. Consider a rigid object consisting on two spheres of different masses connected by a rod.

### What happens to the center of mass when the system moves?

When the system of particles is moving, the center of mass moves along with it. The center of mass velocity equation is the sum of each particle’s momentum (mass times velocity) divided by the total mass of the system. This equation shows the velocity of the center of mass of three particles:

https://www.youtube.com/watch?v=6qwvvKnzIfQ