Question

I need help in this pls i really need a answer

Answer 1

In terms of distance, average speed is 20 km/h

In terms of displacement, average speed is 0 km/h.

Step-by-step explanation:

Total distance:

`= (40.0 - 10.0) + (20.0 - 10.0) + (40.0 - 20.0) \\ = 30.0 + 10.0 + 20.0 \\ = 60.0 \: km`

Total time is 3.0 hours

but:

`average \: speed = (total \: distance)/(total \: time) \\`

In terms of distance.

substitute:

`average \: speed = (60.0)/(3.0) \\ \\ = 20 \: {kmh}^( - 1)`

`displacement = ( - 30.0) + 10 .0+ 20.0 \\ = 0`

In terms of displacement:

`speed = (0)/(3) \\ \\ = 0 \: {kmh}^( - 1)`