NEET Physics Practice Exam 2025 – Complete Prep Resource

Acceleration is defined as the rate at which velocity changes over time. This means that if an object is speeding up, slowing down, or changing direction, its velocity is changing, and thus it is accelerating. Acceleration quantifies how quickly this change in velocity is occurring. It is typically measured in meters per second squared (m/s²).

In contrast, the other options provide definitions that do not accurately describe acceleration:

- The change in distance per unit time refers to speed or velocity, not acceleration.

- The total distance covered in a given timeframe also defines distance traveled but does not account for the change in velocity.

- The product of mass and force describes Newton's second law of motion, which relates force to mass and acceleration, not the definition of acceleration itself.

This understanding of acceleration is crucial in physics, particularly in kinematics and dynamics, where the behaviors of moving objects and the effects of forces on them are studied.