a medieval military expedition, one of a series made by Europeans to recover the Holy Land from the Muslims in the 11th, 12th, and 13th centuries.
The toy car will travel farthest. Here's why. If you push a toy car, it will move across the floor a few feet. But if you push a school bus with the same force it will not move at all. <span />
<span>Newton's 2nd Law of Motion. </span>
<span />F = m x a
force = mass X acceleration
Hope this helps. :)
Creativity was the result of the emphasis
One of the most significant challenges is building an airplane had to do with "propulsion", since the technology that allowed motors to have enough energy to lift an airplane into the sky with a passenger wasn't available for most of history.