Acceleration is the rate at which an object's velocity changes over time. It is a vector quantity, meaning it has both magnitude (how much the velocity changes) and direction (the direction in which the velocity changes).
Acceleration is typically measured in meters per second squared (m/s²) in the metric system, or feet per second squared (ft/s²) in the imperial system. It can also be measured in other units such as kilometers per hour squared (km/h²) or miles per hour squared (mi/h²).
Acceleration is caused by a change in velocity, which can be caused by a force acting on an object. This force can be applied by gravity, friction, or other external forces.
Velocity is the measure of an object's speed and direction, while acceleration is the measure of how much the velocity changes over time. In simpler terms, velocity tells us how fast an object is moving, while acceleration tells us how quickly its speed is changing.
Acceleration can be calculated by dividing the change in an object's velocity by the time it takes for that change to occur. This can be represented by the formula a = (vf - vi) / t, where a is acceleration, vf is the final velocity, vi is the initial velocity, and t is the time interval.