Question

A particle moves 3 m north, then 4 m east, and then 12 m
vertically upwards, its displacement is
(1) 12 m
(2) 13 m
(3) 19 m
(4) 15 m
​

Answer 1

Answer:

13

North and east are on one plane so their displacement is 5m by Pythagoras theorem.Now 12m upward is in another plane (imagine a triangle having base length 5m and 12 m high) .so displacement will be 13m by Pythagoras