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Lapatulllka [165]

3 years ago

10

7th grade math please helpp i have alot of questions due in 10mins

1 answer:

max2010maxim [7]3 years ago

3 0

Answer:

V=247.8

Step-by-step explanation:

V=whl

V = (4.2)(5)(11.8)

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Find the components of the vertical force Bold Upper FFequals=left angle 0 comma negative 10 right angle0,−10 in the directions

quester [9]

Solution :

Let $v_0$ be the unit vector in the direction parallel to the plane and let $F_1$ be the component of F in the direction of $v_0$ and $F_2$ be the component normal to $v_0$ .

Since, $|v_0| = 1,$

$(v_0)_x=\cos 60^\circ= \frac{1}{2}$

$(v_0)_y=\sin 60^\circ= \frac{\sqrt 3}{2}$

Therefore, $v_0 = \left$

From figure,

$|F_1|= |F| \cos 30^\circ = 10 \times \frac{\sqrt 3}{2} = 5 \sqrt3$

We know that the direction of $F_1$ is opposite of the direction of $v_0$ , so we have

$F_1 = -5\sqrt3 v_0$

$=-5\sqrt3 \left$

$= \left$

The unit vector in the direction normal to the plane, $v_1$ has components :

$(v_1)_x= \cos 30^\circ = \frac{\sqrt3}{2}$

$(v_1)_y= -\sin 30^\circ =- \frac{1}{2}$

Therefore, $v_1=\left< \frac{\sqrt3}{2}, -\frac{1}{2} \right>$

From figure,

$|F_2 | = |F| \sin 30^\circ = 10 \times \frac{1}{2} = 5$

∴ $F_2 = 5v_1 = 5 \left< \frac{\sqrt3}{2}, - \frac{1}{2} \right>$

$=\left$

Therefore,

$F_1+F_2 = \left< -\frac{5\sqrt3}{2}, -\frac{15}{2} \right> + \left< \frac{5 \sqrt3}{2}, -\frac{5}{2} \right>$

$= = F$

3 0

2 years ago

Michael threw a baseball 17.6 meters. His older brother, Kyle, threw a baseball 3.5 times farther than Michael. How far did Kyle

lukranit [14]

Answer: 61.6

Step-by-step explanation:

17.6 X 3.5 = 61.6

6 0

2 years ago

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PLEASE HELP EM THANKS Solve |c - 2| = 10.

yKpoI14uk [10]

$|c-2|=10\\
c-2=10 \vee c-2=-10\\
c=12 \vee c=-8$

4 0

2 years ago

Please can you answer this!!!

rewona [7]

Answer:

26.35 °C

Step-by-step explanation:

To find, how much the maximum daily temperature is higher than that of minimum, we'll subtract both.

=> 21.85 - (-4.7)

=> 21.85 + 4.7

=> 26.35 °C

8 0

2 years ago

Where to put this on the number line?

lawyer [7]

Answer:

Step-by-step explanation:

add 9 to both sides.
then divide by 1.5

so p > 8

number your number line: 2,4,6,8,10

draw a circle at 8 and the line to the right since p>8

8 0

2 years ago

Read 2 more answers