3 years ago

The main difference between speed and velocity involves

Physics

2 answers:

mars1129 [50]3 years ago

6 0

Velocity is speed plus the direction of the speed.

miss Akunina [59]3 years ago

3 0

The Correct answer to this question for Penn Foster Students is: Direction

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A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.9 s. What is the coefficient of kinetic

Ilia_Sergeevich [38]

Answer:

$\mu_k=0.27$

Explanation:

According to the free body diagram, in this case, we have:

$\sum F_x:-F_k=ma\\\sum F_y:N=mg$

Recall that the force of friction is given by:

$F_k=\mu_k N$

Replacing and solving for the coefficient of kinetic friction:

$-\mu_kN=ma\\-\mu_k(mg)=ma\\\mu_k=-\frac{a}{g}$

We have an uniformly accelerated motion. Thus, the acceleration is defined as:

$a=\frac{v_f-v_0}{t}\\a=\frac{0-5\frac{m}{s}}{1.9s}\\a=-2.63\frac{m}{s^2}$

Finally, we calculate $\mu_k$ :

$\mu_k=-\frac{-2.63\frac{m}{s^2}}{9.8\frac{m}{s^2}}\\\mu_k=0.27$

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3 years ago

With a force of 5 newtons, Amanda pushes the stack of books to the right. At the same time, Jeremy, her little brother, pushes t

Vaselesa [24]

Its letter C. 5N to the left. Since Jeremy's force in Newtons are higher than Amanda's (in newtons), and since Jeremy's force directs to the left, then the direction of the force will be to the LEFT. Then subtract the higher one to the lower one so that would be: 10N-5N=5N. So it is C. 5N to the left.

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3 years ago

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Table salt is made up of one sodium atom and one chlorine atom. Is table salt an element

olga55 [171]

No, it simply consists of elements.

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2 years ago

Which state has particles that are the closest together?

lara31 [8.8K]

The answer will be D. Solid

This is due to solids having little movement/vibrations allowing for the particles to be compact. They don't get to have much freedom.

Most to least will

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3 years ago

If you don’t know the answer please please don’t answer, I have to do this for a test and it’s 100 points

frutty [35]

Answer:

I believe that it's C

Explanation:

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2 years ago

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