Question

You walk forward 10 meters, backwards 5 meters, and then 10 meters forwards in 15 seconds. What is your overall velocity FORWARDS in m/s?

Answer 1

The overall velocity is 1 m/s .

Step-by-step explanation:

Given that,

He walk forward 10 meter, 5 m backward and then 10 m forward.

Time = 15 sec

We need to calculate the total distance

`D = 10+10-5=15\ m`

We need to average velocity

Using formula of average velocity

`v = (D)/(T)`

Where, D = total distance

T = total time

Put the value into the formula

`v=(15)/(15)`

`v = 1 m/s`

Hence, The overall velocity is 1 m/s .

Answer 2

Overall velocity of a person is 1.66
`(m)/(s)`

Step-by-step explanation:

Let the forward displacement of the person is taken as positive and backward displacement is taken as negative.

You walk forward 10 meters,

displacement =
`x_(1)` = 10 meter

You walk backward 5 meters,

displacement =
`x_(2)` = -5 meter

You walk forward 10 meters,

displacement =
`x_(3)` = 10 meter

Total displacement = s =
`x_(1) + x_(2) +  x_(3)`

s = 15 -5 +15

s = 25 meter

Total time taken is given by,

t = 15 second

Overall velocity is the average velocity of a person and it is given by,

Average velocity =
`(Total displacement)/(Total time)`

Average velocity =
`(25)/(15)`

Average velocity = 1.66
`(m)/(s)`

Thus, overall velocity of a person is 1.66
`(m)/(s)`