What is the key difference between speed and velocity? Give an example where two objects have the same speed but different velocities.

Speed is the rate at which an object covers distance. It is a scalar quantity, meaning it only has magnitude. Velocity is the rate at which an object changes its displacement. It is a vector quantity, meaning it has both magnitude and direction.

Example: Two cars are traveling at 60 km/h. Car A is moving north, and Car B is moving south. Both cars have the same speed (60 km/h), but their velocities are different because they are moving in opposite directions.