Question

a boy travels d distance towards north with speed v1 and then takes a right turn towards east to travel same distance d with speed v2 find average velocity of entire journey​

Answer 1

Answer:

√2v1v2 /(v1 + v2)

Explanation:

A boy travels d distance towards north with speed v1 and then takes a right turn towards east to travel same distance d with speed v2 find average velocity of entire journey​

travels d distance towards north with speed v1

Time = d/v1

takes a right turn towards east

travel distance d with speed v2

Time = d/v2

Total Time = d/v1 + d/v2   =  d(v1 + v2)/v1v2

Total Distance = √d² + d² = d√2

Avergae velocity = d√2 /(d(v1 + v2)/v1v2)

= √2v1v2 /(v1 + v2)