Question

Que no. 11 bata do jaldi se muje nahi a raha he

Answer 1

Explanation:

Distance covered = 4460 - 4200 = 260 km

Time taken = 4 hrs 20 mins = 13/3 hrs

Average Speed = 260 × 3/13 = 60 km/hr

Average Velocity = 0 [As he returned to Delhi and therefore displacement equals 0. As

Average Velocity = Total displacement/ Total Time.]

Average speed = 60 km/hr = 60 × 5/18 = 50/3 m/s

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Answer 2

Average speed = 60 km/h

Average velocity = 0 km/h

Explanation:

• Average speed of any journey is defined as the ratio of total distance covered to total time taken. Average speed is a scalar quantity as it depends on distance covered and distance is also a scalar quantity so have only magnitude regardless of direction.
• Average velocity is the ratio of total displacement covered by the body to total time taken. It is a vector quantity as displacement is vector quantity hence it depends on direction as well

Given, initial reading of odometer = 4200 km

final reading of odometer = 4460 km

Total time taken during the whole journey = 4 h 20 min

=> total time taken = 4+ $\frac{20}{60}$ h

=> t = 4+ $\frac{1}{3}$

=> t = $\frac{13}{3}$ h

Total distance covered = final reading - initial reading

=> total distance = 4460 - 4200 km

=> total distance = 260 km

Average speed = $\frac{total distance}{total time take}$

=> Average speed = $\frac{260}{\frac{13}{3} }$

=> Average speed = 60 km /h

Average velocity = $\frac{total displacement}{total time take}$

=> total displacement = 0  

(initial and final point i the whole journey are same)

=> Average velocity = $\frac{0}{\frac{13}{3} }$

=> Average velocity = 0 km/h

To know more about average velocity and average speed, visit:

Distinguish between average speed and average velocity

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