Velocity of particle remains constant:

To determine if the velocity of a particle remains constant, we need to follow these steps:

1. Define the velocity of the particle: Velocity is a vector quantity that describes the rate at which an object changes its position. It is defined as the displacement of the particle divided by the time taken to cover that displacement.

2. Measure the initial velocity: To determine if the velocity remains constant, we need to measure the initial velocity of the particle. This can be done by measuring the displacement of the particle over a known time interval.

3. Measure the final velocity: After a certain time interval, measure the displacement of the particle again and calculate the final velocity.

4. Compare the initial and final velocities: If the initial and final velocities are the same, then the velocity of the particle remains constant. This means that the particle is moving at a constant speed in a straight line.

5. Consider external factors: It is important to consider any external factors that may affect the velocity of the particle. For example, if there are forces acting on the particle, such as friction or gravity, they may cause the velocity to change.

By following these steps, we can determine if the velocity of a particle remains constant or if it changes over time.