Question

a person moves 3km towards east and turned towards north and travelled a distance of 4km . Find total distance and total displacement​

Answer 1

Answer :

A person moves 3km towards east and turned towards north and travelled a distance of 4km.

We have to find

• Distance
• Displacement

★ Distance is defined as the actual length of path covered by moving object$.$

• It is a scalar quantity.
• It has only magnitude.
• SI unit : m

➠ Distance = AB + BC

➠ Distance = 3 + 4

➠ Distance = 7 km

★ Displacement is defined as the shortest distance b/w initial and final position of the entire journey.

• It is a vector quantity.
• It has both magnitude as well as direction.
• SI unit : m

➠ Displacement = AC

As per pythagoras theorem ;

• AC² = AB² + BC²
• AC² = 3² + 4² = 25
• AC = 5 km

➠ Displacement = 5 km