When a body is accelerating uniformly, there are several quantities that must be changing.
Velocity: The velocity of the body is changing over time. Uniform acceleration implies that the rate of change of velocity is constant. The body's speed and direction are both affected during uniform acceleration.
Displacement: The body's displacement, or position, is changing over time. As the body accelerates, it covers a certain distance and changes its position relative to a reference point.
Time: The time elapsed is continuously increasing as the body undergoes uniform acceleration. Time plays a crucial role in measuring the duration of acceleration and determining the body's position at different points in time.
Acceleration: The acceleration itself is the rate of change of velocity. In the case of uniform acceleration, the magnitude and direction of the acceleration remain constant throughout the motion.
Kinetic Energy: If the body is subject to uniform acceleration, its kinetic energy is changing. As the body's velocity increases, its kinetic energy also increases due to the relationship between velocity and kinetic energy (KE = 0.5 * m * v^2, where m is the mass and v is the velocity).
These are the key quantities that change when a body undergoes uniform acceleration. Understanding and analyzing these changes help describe the motion of the body and quantify its behavior.