It’s distance for my answer but tell me if anyone tells u this answer thanks
<span>When you are in the way of a moving object and a collision is sure to occur, you are better off decreasing its momentum over time. Which is nothing but force.
mv/t = m.a = F
Fill the blank as: "Time"
Hope this helps!</span>
Set up the problem with the conversion rates as fractions where when you multiply the units cancel out leaving the desired units behind.
Picture is blurry…. try re uploading it