A jogger starts at one corner of a rectangular field 48 m long and 20 m wide…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A jogger starts at one corner of a rectangular field long and wide. She jogs along the length, then along the width, to the opposite corner. Find the distance she covers and her displacement.
Need a reminder? The key ideaShow
Distance is the length of the whole path; it has no direction and never decreases. Displacement is the straight line from start to end, with a direction. On a straight road use signs; for a right-angle turn, displacement .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Distance. .
Step 2. Displacement. , along the diagonal.
Answer: ; .
Check. The diagonal is shorter than going round two sides, as it must be.
Discussion (0)
Log in to join the discussion.
Loading…