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kifflom [539]
3 years ago
6

A block is sliding on a level surface of varying materials, and so its effective coefficient of friction is variable, 0.1t, wher

e t is the time in seconds for how long the block has been sliding. If the block was initially moving at 43.5 m/s, then how far does it move in 5.1 s
Engineering
1 answer:
4vir4ik [10]3 years ago
5 0

Answer:

\Delta s = 189.166 m

Explanation:

The physical for the system is based on Work-Energy Theorem and Principle of Energy Conservation. The system decelerates because of friction before coming to rest:

K_{1} = W_{loss,1 \longrightarrow 2}

\frac{1}{2} \cdot m \cdot v^{2} = \mu (t) \cdot m \cdot g \cdot \Delta s

The distance before stopping is isolated from expression presented above:

\Delta s = \frac{ v^{2}}{2 \cdot \mu(t)\cdot g}

Where \mu (t) = 0.1\cdot t and g = 9,807 \frac{m}{s^{2}}.

By replacing all variables, the needed distance is finally found:

\Delta s = \frac{(43.5 \frac{m}{s})^{2}}{2 \cdot [0.1\cdot (5.1 sec)]\cdot (9.807 \frac{m}{s^{2}} )}

\Delta s = 189.166 m

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m_a_m_a [10]

Answer:

Explanation:

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        ("Joan", "unlisted", 12.7) :: Nil

 

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def find_salary(name: String) = {

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   case Nil    =>

     throw new Exception("Invalid Argument in find_salary")

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}

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   case (p1, p2, p3) :: t if pred(p1, p2, p3)  => (p1, p2, p3) :: search(t)

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println("Searching the salary of 'Joan' at db: " + find_salary("Joan"))

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println("All employees that match with predicate 'salary < 100.0': ")

println("\t" + select(predicate) + "\n")

7 0
3 years ago
Shelly cashman word 2016 module 2 - project a pdf - does anyone have the fished paper
JulijaS [17]

Answer:

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5 0
2 years ago
A turntable A is built into a stage for use in a theatrical production. It is observed during a rehearsal that a trunk B starts
lions [1.4K]

Answer:

The coefficient of static friction, μₛ, between the trunk and turntable = 0.32

Explanation:

For this motion of the trunk B,

Initial velocity, v₀ = 0

Tangential Acceleration, a = 0.28 m/s²

Time taken, t = 10s

Using equations of motion,

v = v₀ + at

v = 0 + 0.28 × 10 = 2.8 m/s

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Force keeping the trunk B in circular motion must balance the frictional forces.

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μₛ = v²/gr

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Hope this helps!!!

3 0
3 years ago
Why doesn't any one give as many points as i do for random questions on brainly
erastova [34]

good question i like to give about 20. i think people just are cheapskates for most of their time on this planet. didnt need the 50 though but thanks.

4 0
2 years ago
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shusha [124]

The controller determines if a(n) error exists by calculating the difference between the SP and the PV.

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The Control system is one where it entails if the output is one that has an effect on the input quantity.

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brainly.com/question/14617664

#SPJ1

7 0
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