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VARVARA [1.3K]
3 years ago
15

How fast an object is moving is its

Physics
1 answer:
faltersainse [42]3 years ago
4 0

Answer:

D. Speed !!!!!

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Assuming that Albertine's mass is 60.0 kg , for what value of μk, the coefficient of kinetic friction between the chair and the
makvit [3.9K]

Answer:

\mu_k=0.101

Explanation:

It is given that,

Mass of Albertine, m = 60 kg

It can be assumed, the spring constant of the spring, k = 95 N/m

Compression in the spring, x = 5 m

A glass sits 19.8 m from her outstretched foot, h = 19.8 m

When she just reach the glass without knocking it over, a force of friction will also act on it. Using the conservation of energy for the spring mass system such that,

\dfrac{1}{2}kx^2=\mu_k mgh

\mu_k=\dfrac{kx^2}{2mgh}

\mu_k=\dfrac{95\times (5)^2}{2\times 60\times 9.8\times 19.8}

\mu_k=0.101

So, the coefficient of kinetic friction between the chair and the waxed floor is 0.101. Hence, this is the required solution.

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3 years ago
What is the approximate velocity of the object at 5 seconds ? .
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do you have an image?

Explanation:

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Which sequence shows the chain of energy transfers that create surface currents on the ocean?
Papessa [141]

Answer:

The correct answer is A. The sun is the energy source of the surface currents in the ocean

6 0
2 years ago
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Sladkaya [172]
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If a car goes around a corner at a constant 20 miles/hour, does its velocity change?
UNO [17]

Answer:

yes

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velocity changes either in magnitude (an increase or decrease in speed) or in direction, or both

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3 years ago
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