Question

How much time would Simpson save by increasing his average velocity to 26m/s East?

Answer 1

Answer:

8 minutes

Explanation:

Part of the question is missing. Complete question is:

Simpson drives his car 144 km with an average velocity of 24 m/s toward the east. How much time would Simpson save by increasing his average velocity to 26m/s East?

Solution:

First of all, we have to calculate the time it takes for Simpson to complete the drive moving at the initial velocity, 24 m/s. We can use the formula:

$t=\frac{d}{v}$

where

$d=144 km = 1.44\cdot 10^5 m$ is the displacement

$v=24 m/s$ is the velocity

Substituting,

$t=\frac{1.44\cdot 10^5}{24}=6000 s = 100 min$

While driving at 26 m/s, the time taken will be

$t=\frac{1.44\cdot 10^5}{26}=5538 s=92 min$

So, Simpson will save 8 minutes.