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Answer:

Man goes 50 m to North , then 40 m to East and 20 due South. We need to find out the displacement of the whole journey.

First of all , we need to define Displacement :

Displacement is the shortest length between the starting and stopping point. It's a vector having both directions and magnitude.

Look.at the attached diagram to understand his trajectory from home to field.

So the diagram shows a Trapezium like figure which is formed in his journey . We need to find x.

Thos can be done using Pythagoras theorem:

So displacement is 50 m

Given:-

To find:-

Solution:-

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