select the correct answer.\nthe velocity of a ball as it is thrown up is 20 meters/second. it attains zero…

select the correct answer.\nthe velocity of a ball as it is thrown up is 20 meters/second. it attains zero velocity after 3.5 seconds. what is the average acceleration of the ball during its upward flight?\na. 5.7 meters/second\nb. 0.57 meters/second\nc. -0.57 meters/second²\nd. -5.7 meters/second²\ne. 5.5 meters/second²

select the correct answer.\nthe velocity of a ball as it is thrown up is 20 meters/second. it attains zero velocity after 3.5 seconds. what is the average acceleration of the ball during its upward flight?\na. 5.7 meters/second\nb. 0.57 meters/second\nc. -0.57 meters/second²\nd. -5.7 meters/second²\ne. 5.5 meters/second²

Answer

Explanation:

Step1: Recall acceleration formula

The formula for average acceleration is $a=\frac{v - u}{t}$, where $v$ is final - velocity, $u$ is initial - velocity, and $t$ is time.

Step2: Identify given values

We are given that $u = 20$ m/s, $v = 0$ m/s, and $t=3.5$ s.

Step3: Substitute values into formula

$a=\frac{0 - 20}{3.5}=\frac{- 20}{3.5}\approx - 5.7$ m/s².

Answer:

D. -5.7 meters/second²