Question

a body travels a distance of 3 km towards east then 4 km towards north and finally 9 km towards east find the total distance travelled and the resultant
displacement​

Answer 1

Answer:

Total distance travelled =3+4+9=16 km

The body travels a total distance of 12 km in east direction i.e. towards x-axis.  

And it travels a distance of 4 km in North direction, i.e. towards y-axis.  

Hence, resultant displacement is  

=  

12  

2

+4  

2

 

​

=  

144+16

​

=  

160

​

=12.6km

Answer 2

Explanation:

Total distance travelled =

$3 + 4 + 9 = 16$

The resultant and the displacement =

The body travels a total distance of 12 km in east direction i.e. towards x-axis. And it travels a distance of 4 km in North direction, i.e. towards y-axis.

Hence resultant displacement is

$= \sqrt {12} {}^{2} + 4 {}^{2} = \sqrt{144 + 16 } = \sqrt{160} = 12.6km$

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