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velikii [3]
3 years ago
10

A runner moves west with an initial velocity of 4 m/s. She accelerates 3 m/s2 for 30 seconds. The runner's final velocity is

Physics
1 answer:
Firlakuza [10]3 years ago
3 0

Answer:

v = 94m/s

Explanation:

Using the first equation of motion

v = u + at

u = 4m/s , a = 3m/s² , t = 30s , v = ?

v = u + at

v = 4 + 3 × 30

v = 4 + 90

v = 94m/s

I hope this was helpful, please mark as brainliest

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natima [27]

0.6/5,1,5

so calculate it

not so sure though

6 0
3 years ago
A 72 kg skydiver can be modeled as a rectangular "box" with dimensions 21 cm × 41 cm × 170 cm . if he falls feet first, his drag
LuckyWell [14K]

Formula for terminal velocity is:


Vt = √(2mg/ρACd) 
<span>Vt = terminal velocity = ?
<span>m = mass of the falling object = 72 kg
<span>g = gravitational acceleration = 9.81 m/s^2
<span>Cd = drag coefficient = 0.80
<span>ρ = density of the fluid/gas = 1.2 kg/m^3</span>
<span>A = projected area of the object (feet first) = 0.21 m * 0.41 m = 0.0861 m^2

Therefore:</span></span></span></span></span>

Vt =  √(2 * 72 * 9.81 / 1.2 * 0.0861 * 0.80) 

<span>Vt = 130.73 m/s</span>

4 0
3 years ago
Alaskan Natives often eat whale blubber while other groups of people typically do not. This is an example of __________. A. food
8_murik_8 [283]

Answer:

This is an example of Learned preferences.

Explanation:

Alaskan natives are divided into five major groups viz: aleuts, southern eskimos, northern eskimos, interior indians and coastal indians. Although the five groups all have similar ethnic similarities, they occupy different geographical locations in Alaska. The alaska natives have overtime had to adapt to certain conditions largely because of their environment.

6 0
4 years ago
Read 2 more answers
Lana does her homework as soon as she can after class, but she still doesn't undertand everything she suppose to learn. what cou
Lilit [14]
I added a screenshot with the complete question

<span><u><em>Answer:</em></u>
D. Ask her instructor questions about it the next day

<u><em>Explanation:</em></u>
We are given that Lana doesn't understand everything she's supposed to learn from the homework.

<u>Let's check the options:</u>
<u>1- start working on it eve earlier</u>
We know that she works on the homework as soon as she can. Working on it even earlier will not help her understand the difficult parts

<u>2- put it off until she's ready to work on it</u>
This is not the best option as it wont help her understand difficult parts. On the contrary, she might lose the time she has to practice the parts she understands and gain as much knowledge as possible

<u>3- Only work on it directly before going to class.</u>
this is the same as option 2. She might not even be able to finish it before the class

<u>4- Ask her instructor questions about it the next day</u>
This is the best solution as it will help her recap what she needs to learn and understand any difficult concepts as soon as possible which will help optimize her benefits

Hope this helps :)</span>

7 0
3 years ago
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It would be at least 150m/s
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