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3 years ago

If you can answer my last post ill give you 75 points pls its very important and please make sure it correct!!!!!!!

Physics

2 answers:

Norma-Jean [14]3 years ago

8 0

Answer:

Explanation:

ok how many points is this?????

Hoochie [10]3 years ago

5 0

Answer:

I can't see the post :/

Explanation:

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(II) How much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor without acceleration, if

Gwar [14]

Answer:

2324 J

Explanation:

The formula for work is:

$W=F*d$

where $F$ is the force applied, and $d$ is the distance moved, in this case $d=10.3m$

and we need to find $F.$

Since the crate is not moving up or down, we conclude that the <u>normal force must be equal to the weight </u>of the object:

$N=w$

where $N$ is the normal force and $w$ is the weight, which is: $w=mg$ , where g is the gravitational acceleration $g=9,81m/s^2$ and $m$ is the mass $m=46kg$ .

---------

Thus the normal force is:

$N=mg$

Now, the force due to the friction is defined as:

$f=\mu N=\mu mg$

where $\mu$ is the coefficient of friction, $\mu =0.5$

So, for the crate to move, the force applied must be equal to the frictional force:

$F=f\\F=\mu mg$

And now that we know the force we can calculate the work:

$W=F*d\\W=\mu mg*d$

substituting known values:

$W=(0.5)(46kg)(9.81m/s^2)(10.3)\\W=2324J$

5 0

3 years ago

Read 2 more answers

1: Solve for acceleration. Write the units of your answer next to the number

aleksandrvk [35]

1. 7.1111m/s Recurring
Solution a = v/t basically divide the velocity by the time taken
2. 9.375m/s
Same solution as before

5 0

3 years ago

What happens if both the maximum voltage and current are exceeded and 10W of power must be dissipated?

Aleksandr [31]

Answer:

If both the maximum voltage and current are exceeded in a resistor, that the point will lie in the thermal breakdown of the resistor.

Explanation:

This indicated that there will be an abundance of free electrons which will be available freely. This abundance of the electrons in a conductor, will result in the reduction of the overall conductivity. whereas in an insulator or semiconductor this will enhance the overall conductivity.

As the point lies in the thermal breakdown, the Ohm's law is no longer valid and thus no analytical solution can be presented in this regard.

3 0

4 years ago

21. A positively charged rod will have the strongest attraction for

Ilya [14]

It will have the strongest attraction for a conductor.

8 0

3 years ago

In a wave, what do you call the difference from crest to crest or trough to trough

UNO [17]

The correct answer is "wavelength".

In fact, this is exactly the definition of wavelength: in a wave, the wavelength is defined as the distance between two succesive crests or two successive troughs, therefore the correct answer is
D) wavelength.

7 0

3 years ago