MCQ
An aeroplane flies $400 \,m$ north and $300 \,m$ south and then flies $1200 \,m$ upwards then net displacement is...........$m$
- ✓$1200$
- B$1300$
- C$1400$
- D$1500$
✓
Answer
Correct option: A.
$1200$
a
(a) An aeroplane flies $400 \,m$ north and $300\, m$ south so the net displacement is $100 \,m$ towards north.
(a) An aeroplane flies $400 \,m$ north and $300\, m$ south so the net displacement is $100 \,m$ towards north.
Then it flies $1200 \,m$ upward so $r = \sqrt {{{(100)}^2} + {{(1200)}^2}} $
$ = 1204\,m \simeq 1200\,m$
The option should be $1204\, m$, because this value mislead one into thinking that net displacement is in upward direction only.
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