Question

You start walking from a point on a circular field of radius 0.5 km and in one hour later you are at the same point. So what is average velocity and average speed? ​

Answer 1

Answer:

1). average velocity= displacement/time

= here displacement is zero

= 0/1

= 0 m/s

2). average speed= total distance/time

=2πr/1

=(2×22/7×5/10)/1

22/7

3.14 km/h

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Answer 2

The average velocity is 0 km/hr and the average speed is 3.14 km/hr

Step-by-step explanation:

Given: A circular field of radius, r = 0.5 km

Time, t =  1 h

To find: Average velocity $v_{av}$and average speed $u_{av}$

Formula used:

• $v_{av} = \frac{displacement}{time}$
• $u_{av} = \frac{distance}{time}$
• Circumference of a circle $C = 2\pi r$

Solution:

• The initial position and final positions are the same.

Hence, displacement = 0 km

Average velocity = 0 km/h

• Distance covered =  Circumference of the circular field

                             $= 2\pi r = 2 \times 3.14 \times 0.5 = 3.14 km$

• Average speed $u_{av} = \frac { 3.14 km}{1 hr}$= 3.14 km/hr

Thus, the average velocity is calculated to be 0 km/hr and the average speed is calculated to be 3.14 km/hr.