Answer:
Resultant displacement = 5 m
Step-by-step explanation:
A student walks 3 m north and 4 m south.
We need to find the magnitude of the resultant displacement for the student.
He walks in the North and then in South direction. The magnitude of resultant displacement is given by :
![D=√(3^2+4^2) \\\\D=√(9+16) \\\\D=5\ m](https://img.qammunity.org/2021/formulas/physics/college/utg7hry88yvdhukpp8n81p5d4l1dvyazdj.png)
So, the magnitude of the resultant displacement for the student is 5 m.