Velocity and Speed in Different Types of Motion

Uniform Straight Line Motion
In uniform straight line motion, an object moves in a straight line with a constant speed. The speed of an object is the magnitude of its velocity. Velocity, on the other hand, is a vector quantity that includes both speed and direction.

Uniform Circular Motion
In uniform circular motion, an object moves in a circular path with a constant speed. The speed of the object remains constant, but its velocity changes continuously because the direction of motion is constantly changing. The velocity vector of an object in uniform circular motion is always tangential to the circular path at any given point.

Projectile Motion
Projectile motion refers to the motion of an object that is launched into the air and moves along a curved path under the influence of gravity. It is a combination of vertical and horizontal motions. The vertical component of motion is influenced by gravity, while the horizontal component remains constant if there is no air resistance.

Comparison
Now let's compare the speed and velocity in each type of motion:

Uniform Straight Line Motion:
- Speed: The speed remains constant throughout the motion.
- Velocity: Since the object is moving in a straight line, the velocity is also constant and in the same direction as the motion.

Uniform Circular Motion:
- Speed: The speed remains constant throughout the motion.
- Velocity: The velocity is constantly changing because the direction of motion is constantly changing. The magnitude of velocity remains constant, but its direction continuously changes.

Projectile Motion:
- Speed: The speed may vary at different points during the motion, depending on the vertical and horizontal components.
- Velocity: The velocity is constantly changing due to the influence of gravity. The magnitude of velocity changes due to the vertical component, and the direction changes due to both the vertical and horizontal components.

Conclusion
In conclusion, a body will have the same speed and velocity in uniform straight line motion. In this type of motion, the object moves in a straight line with a constant speed, resulting in a constant velocity in the same direction as the motion. However, in uniform circular motion and projectile motion, the speed remains constant but the velocity changes due to the changing direction of motion.

A uniform staight line motion