Which of the following is the main difference between speed and velocity? 1. speed has direction and velocity. 2. speed is measured over time. 3. velocity has both speed and direction. 4. speed is constant. 5. there is no difference between speed and velocity.

Hello!

The answer would be #3:

3. Velocity has both speed and direction

The expressions “60 mph” or “5 ft/s” are examples of speed because of their lack of direction. On the other hand, the expressions “60 mph south” or “5 ft/s upward” are examples of velocity because they include a direction.

I hope this helps!