Answer:
The velocity of a body in a circular or curved path is variable due to two main reasons:
1. Change in Direction: In circular or curved motion, the direction of the body is constantly changing as it moves along the path. Velocity is a vector quantity that includes both magnitude and direction. Since the direction is changing, the velocity of the body also changes accordingly. This change in direction leads to a variable velocity.
2. Change in Magnitude: In circular or curved motion, the body moves at different speeds at different points along the path. The magnitude of velocity represents the speed of the body. As the body moves through different parts of the path, it experiences varying accelerations and decelerations, which result in changes in speed. This change in magnitude of velocity also contributes to the variability of the body's velocity.
To illustrate this, consider a car driving on a circular track. As the car goes around the curves, it needs to constantly adjust its velocity to match the changing direction of the track. The car will accelerate when turning and decelerate when approaching a curve. This variability in velocity is necessary to maintain a stable and balanced motion along the curved path.
In conclusion, the velocity of a body in a circular or curved path is variable due to the changing direction and varying magnitude of the body's motion along the path.
Step-by-step explanation: