An example would be gravity
<em>The displacement of an object during a specific unit of time: </em>Velocity (the direction is part of displacement.)
<em>How fast or slow an object is moving and in what direction: </em>Velocity (speed & direction)
<em>How fast or slow an object is moving: </em>Speed (no direction)
<em>A cheetah running 97 km/h: </em>Speed (no direction)
<em>A train traveling 45 m/s north: </em>Velocity (speed & direction)
Explanation:
Visible light is the range of electromagnetic waves that humans can see. Anything that glows or gives off light makes waves of what we call visible light. The sun, light bulbs, candles and fire are all things that people automatically think of when it comes to light, but visible light comes from many sources and in many colors. Some other sources of visible light include: television and computer screens, glow sticks, and fireworks
The first runner because it is very clear that accelarition depends on the time and we know that the time in this case is pretty simple
