It causes a constant downward acceleration of approximately $10 \mathrm{~m} / mathrm{s}^{2}$.

The object's velocity increases linearly with time in the positive direction.

The object's velocity decreases linearly with time, or increases in the negative direction.

It indicates that the object has a non-zero velocity.

It indicates that the object has a non-zero displacement.

The rate of change of position with respect to time at a specific instant; mathematically, $v_{x}=\frac{d x}{d t}$.

The rate of change of velocity with respect to time at a specific instant; mathematically, $a_{x}=\frac{d v_{x}}{d t}$.

The change in position of an object. On a velocity vs. time graph, it's the area under the curve: $\Delta x=\int_{t_{1}}^{t_{2}} v_{x}(t) d t$.

The constant downward acceleration experienced by objects near Earth's surface due to gravity, approximately $g \approx 10 \mathrm{~m} / mathrm{s}^{2}$.

Equations that describe the motion of objects with constant acceleration, relating position, velocity, time, and acceleration.

Displacement: Change in position, can be negative. Distance: Total path length, always positive.

Velocity: Rate of change of displacement, vector quantity. Speed: Rate of change of distance, scalar quantity.

Constant Acceleration: Kinematic equations can be used directly. Non-uniform Acceleration: Kinematic equations cannot be directly applied; requires calculus or graphical analysis.

Position vs. Time: Slope is velocity. Velocity vs. Time: Slope is acceleration, area under the curve is displacement.

Gravity: Acceleration due to gravity is constant (approximately 10 m/s²) and does not depend on the object's mass.