Please teach me dimension in one motion grade 10 physics I really don’t understand it and please explain it in a very simple and understanding way

Let's break down dimensions in physics, especially for motion.

In physics, a dimension refers to the fundamental physical nature of a quantity, like length, mass, or time. It's not about the units (like meters or seconds), but the basic type of measurement.

For one-dimensional motion, we mostly deal with these fundamental dimensions:

• Length (represented by [L]) - for quantities like distance, displacement, position.
• Time (represented by [T]) - for quantities like time interval.
• Mass (represented by [M]) - (less common in basic 1D motion, but fundamental).

Derived quantities in motion have dimensions that are combinations of these:

• Speed or Velocity: (Length)/(Time) or [L]/[T]
• Acceleration: (Length)/(Time)² or [L]/[T]²

Dimensional analysis is a powerful tool to check if an equation is physically consistent. It means that the dimensions on both sides of an equation must be the same.

Let's look at an example:
The equation for distance traveled at a constant speed is:
Distance = Speed × Time
d = v × t