Speed, Velocity, Acceleration

The video tutorial explains the concepts of speed, velocity, and acceleration. Speed is defined as a scalar quantity representing the distance traveled over time, with units like meters per second. It does not indicate direction. Velocity, on the other hand, is a vector quantity that includes both speed and direction, allowing for positive or negative values based on movement direction. Acceleration is introduced as the rate of change of velocity over time, measured in meters per second squared. The tutorial emphasizes the importance of accurate measurements for calculating these quantities.

Explain how speed can be a positive or negative value.

Why is it important to have accurate measurements of distance and time?