Lesson 4 of 8 · Net displacement / final direction
Relative position
Direction Sense · for IPMAT Indore, IPMAT Rohtak and JIPMAT · asked in JIPMAT 2021
The exam method
- Relative statements. pick the most connected point as the origin and place the others one by one; for coded statements decode the rule first (sum, average or product of the two numbers).
Worked examples
Example 2SitterRohtak 2019
A man walks 5 km south, turns right and walks 3 km, then turns left and walks 5 km. In which direction is he from the start?
Solution: south-west. Right from south is west; left from west is south. He ends 10 km south and 3 km west.
Example 1SitterJIPMAT 2022
A man walks 3 km east, turns south and walks 4 km, then turns west and walks 6 km. How far is he from the start?
Solution: 5 km. East 3 - west 6 = 3 km west; 4 km south; .
Watch out
- Heading vs position: "In which direction is she moving?" asks for the last heading (JIPMAT 2021: north), not where she is.
Picked from the Net displacement / final direction note for this micro-concept automatically. The whole note: Net displacement / final direction.