The car took 7 hours to travel 315 miles at 45 mph. Practise calculating speed, distance and time in this quiz. Calculations are very important to plan and execute safe and successful space flights.

Correct. As you would expect, twice the speed equals twice the stopping time. Now here's the catch. Say that same car going thirty required a hundred feet of skidding distance before stopping.

They can use distance to calculate speed, and speed to calculate distance, but not both at once. Motion sideways across the sky cannot be calculated at all, because faraway objects move much too ...

The distance method for calculating the speed of light ... The slope of this linear function should be the actual time interval over the speed of light. Using this, I get a light speed of 84.9 ...