# I want the idea to solve this queation

• May 30th 2010, 07:20 AM
r-soy
I want the idea to solve this queation
Hi all

Q :
Secretariat ran the Kentucky Derby with times for the quarter mile of 25.2 s , 24.0 s , 23.8 s , and 23.0 s .
(A) Find his average speed during each quarter-mile segment .
(B) Assming that Secretariat's instaneous speed at the finish line was the same as the average speed during the final quarter mile , fine his average acceleration for the entire race . ( Hint : recall that horeses in the Derby start from rest )

I want the idea to solve this queation
• May 30th 2010, 07:29 AM
skeeter
Quote:

Originally Posted by r-soy
Hi all

Q :
Secretariat ran the Kentucky Derby with times for the quarter mile of 25.2 s , 24.0 s , 23.8 s , and 23.0 s .
(A) Find his average speed during each quarter-mile segment .
(B) Assming that Secretariat's instaneous speed at the finish line was the same as the average speed during the final quarter mile , fine his average acceleration for the entire race . ( Hint : recall that horeses in the Derby start from rest )

I want the idea to solve this queation

(A) $\displaystyle |\bar{v}| = \frac{|\Delta x|}{\Delta t}$

(B) $\displaystyle \bar{a} = \frac{\Delta v}{\Delta t}$