Definition:
Velocity is the rate of change of an object's position with respect to time. It is a vector quantity, meaning it has both magnitude (speed) and direction.
Key elements:
* Speed: How fast an object is moving. It is measured in units like meters per second (m/s) or kilometers per hour (km/h).
* Direction: The path or course along which an object is moving.
Formula:
Velocity (v) can be calculated using the following formula:
v = Δx / Δt
where:
* Δx is the displacement (change in position) of the object.
* Δt is the time interval over which the displacement occurs.
Examples:
* A car traveling at 60 km/h east has a velocity of 60 km/h east.
* A ball thrown upwards at 10 m/s has an initial velocity of 10 m/s upwards.
Key points to remember:
* Constant Velocity: An object has constant velocity if its speed and direction remain unchanged.
* Changing Velocity: An object's velocity changes if its speed, direction, or both change.
* Acceleration: Acceleration is the rate of change of velocity.
Understanding velocity is crucial in many areas of physics, including kinematics, dynamics, and fluid mechanics.
