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An 84.0 kg sprinter starts a race with an acceleration of 1.76 m/s2. If the sprinter accelerates at that rate for 11 m, and then

gulaghasi [49]

Answer:

t=17.838s

Explanation:

The displacement is divided in two sections, the first is a section with constant acceleration, and the second one with constant velocity. Let's consider the first:

The acceleration is, by definition:

$a=\frac{dv}{dt}=1.76$

So, the velocity can be obtained by integrating this expression:

$v=1.76t$

The velocity is, by definition: $v=\frac{dx}{dt}$ , so

$dx=1.76tdt\\x=1.76\frac{t^{2}}{2}$ .

Do x=11 in order to find the time spent.

$11=1.76\frac{t^2}{2}\\ t^2=\frac{2*11}{76} \\t=\sqrt{12.5}=3.5355s$

At this time the velocity is: $v=1.76t=1.76*3.5355s=6.2225\frac{m}{s}$

This velocity remains constant in the section 2, so for that section the movement equation is:

$x=v*t\\t=\frac{x}{v}$

The left distance is 89 meters, and the velocity is $6.2225\frac{m}{s}$ , so:

$t=\frac{89}{6.2225}=14.303s$

So, the total time is 14.303+3.5355s=17.838s

7 0

3 years ago

What did Greek philosophers, Isaac Newton, and others commonly use to explain

Temka [501]

Answer:

Hey there!

They used math to explain their observations, for example, Newton is famous for his three laws, and universal laws of gravitation.

Let me know if this helps :)

3 0

3 years ago

14*3(36/2(1*3)/6<br><img src="https://tex.z-dn.net/?f=14%20%5Ctimes%203%2836%20%5Cdiv%202%281%20%5Ctimes%203%29%20%5Cdiv%206" id

GarryVolchara [31]

<h2>10.5</h2><h3>remember pemdas</h3>

parentheses
exponents <em>excluded for this problem</em>
multiplication
division
addition
subtraction

<h3>step 1. start with what is at the top of the list.</h3>

parentheses

<h3>step 2. do 1 times 3 since it comes before division, and is in parentheses.</h3>

1 × 3 = 3

<h3>step 3. find 36 divided by 2</h3>

36 ÷ 2 = 18

<h3>step 4. add the values together</h3>

18 + 3 = 21

<h3>step 5. find 14 times 3</h3>

14 × 3 = 42 <em>you can also do 7 × 6 and will get the same result because 7 is half of 14 and 3 is half of 6</em>

<h3>step 6. add what is outside the parentheses</h3>

21 + 42 = 63

<h3>step 7. divide by 6</h3>

63 ÷ 6 = 10.5 $-- >$ 10 remainder of 3 <em>remainder means left over</em>

<em />

7 0

2 years ago

______ carries amino acids to the _____.

sergij07 [2.7K]

RNA carries amino acids to the ribosomes

7 0

3 years ago

Read 2 more answers

Write the word AMBULANCE as it would appear when reflected in a plane mirror

Lady_Fox [76]

ECNALUBMA

Explanation:

When the word AMBULANCE is reflected on a plane mirror, it is shown as ECNALUBMA.

On a plane mirror, lateral inversion occurs and the position of the words are interchanged.

This is why it is written as ECNALUBMA on the front of Ambulance buses.

When scooters and drivers check their side mirror, they will see the properly written ambulance word due to lateral inversion.

Learn more:

Mirror adjustment brainly.com/question/8737441

#learnwithBrainly

7 0

4 years ago