Question

A person is running a 10km race. They start at 4m/s and it takes them 41.67 minutes to run the race. What’s their acceleration

Answer 1

Answer:

$-1.59 \times 10^{-3} m/s^2$ is the acceleration of the person.

Explanation:

Given that,

Initial velocity of the person is 4 m/s

The race is completed in 41.67 minutes = $41.61 \times 60$ = 2500.2 seconds.

The final velocity is 0 m/s as the person completes the race and the speed will be 0 at end of the race.

using the formula,

V = U + at

where,

"V" is "Final velocity"

"U" is "Initial velocity"

"a" is "acceleration"

"t" is "time"

Now, find the "acceleration" by substituting the values in the above formula,

$0=4+a\times 2500.2$

$\frac{-4}{2500.2}=a$

$-1.59 \times 10^{-3} m/s^2$ is the "acceleration" of the person.