The fast server in women's tennis is venus williams, who recorded a serve of 130 mi/h (209 km/h) in 2007. if her racket pushed on the ball for a distance of 0.15 m, what was the average acceleration of the ball during her serve?

The motion of the ball is an uniformly accelerated motion, so we can use the following equation to find the acceleration:

where

is the final velocity of the ball

is the initial velocity of the ball

is the distance during which the force is applied

is the average acceleration

Rearranging the formula and substituting the numbers, we find:

The average acceleration of the ball during her serve : a = 11232.68 m / s

Regular straight motion is the motion of objects on a straight track that has a fixed speed  

Formula used  

S = distance = m  

v = speed = m / s  

t = time = seconds  

Straight motion changes regularly are the straight motion of objects that have a fixed acceleration  

Formula used  

V = vo + at  

Vt² = vo² + 2aS  

St/S = distance on t  

vo = initial speed  

vt = speed on t  

a = acceleration

The initial speed of the ball when hit = 0

Ball speed = 130 miles / h (209 km / h) = 58.05 m/s

Distance traveled by the ball = 0.15 m then

Vt² = vo² + 2as

58.05² = 0² + 2. a.0.15

3369.8 = 0.3.a

a = 11232.68 m / s

The distance of the elevator

link

resultant velocity

link

the average velocity

link

Keywords:  the average acceleration,fixed acceleration, fixed speed

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.