Question

Need help quick!! Cant figure this out

Answer 1

Answer:

The average speed of the car, in miles per hour, from 17:30 to 19:42, is 119.167 meters per second.

Step-by-step explanation:

Physically speaking, average speed ($\bar v$), measured in miles per hour, is the distance travelled ($\Delta s$), measured in miles, divided by time ($\Delta t$), measured in hours. That is:

$\bar v = \frac{\Delta s}{\Delta t}$ (1)

The time needed by the vehicle is:

$\Delta t = 72\,min\times \frac{1\,h}{60\,min}$

$\Delta t = 1.2\,h$

If we know that $\Delta s = 143\,mi$ and $\Delta t = 1.2\,h$, then the average velocity of the car is:

$\bar v = \frac{143\,mi}{1.2\,h}$

$\bar v = 119.167\,\frac{m}{s}$

The average speed of the car, in miles per hour, from 17:30 to 19:42, is 119.167 meters per second.