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Strike441 [17]
3 years ago
15

What support system do you have in place to complete your scheduled exercises? How and why did you

Physics
1 answer:
Bingel [31]3 years ago
6 0

Answer:

It has to be important to you.

-It has to be something that you are in control of.

-It has to be attainable, or able to be achieved.

-It has to be clear and specific.

-It has to have a plan.

Wellness

Wellness refers to a healthy state of being in body, mind, and emotion.

Body wellness

means eating right, exercising, and keeping your bodily systems in good health.

Mental wellness

means feeling safe and secure in your environment and at peace with your decisions and actions.

Emotional wellness

means feeling your best and having the ability to deal with many different situations.

Wellness: Setting Goals

The first step to setting a goal is defining it. Keep in mind that not everything you wish for can be a goal. When it comes to physical activity, diet, and exercise, you may wish to run a marathon before the end of the school year. However, this goal could be difficult to achieve if school ends in just a few months and you are not already training. A more reasonable goal might be to be able to run a mile in the amount of time considered healthy for your age group.

Importance of Physical Education

Physical education explores the methods, types, and benefits of physical activity for the body. In addition to staying active, making healthy choices about diet and exercise is important to overall personal and long-term health. Long-term health passed down through generations can also promote healthy family lifestyles.

Fitness

is the ability of the body to function effectively and efficiently during physical activity and is the ability to move joints through an entire range of motion.

Physical exercise

is the act of improving one's body through specific intentional movements.

differences between exercise and fitness

while anyone can exercise, only someone who exercises regularly can be fit.

Why is it important to make healthy choices about your diet and exercise?

Choosing healthy behaviors when it comes to diet and exercise is important to personal health, long-term health, and promoting healthy family lifestyles.

five components of physical education:

-Cardiorespiratory endurance

-Muscular strength

-Muscular endurance

-Flexibility

-Body composition

Explanation:

Life is WORTH LIVING

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A ski tow operates on a 15.0° slope of length 300 m. The rope moves at 12.0 km/h and provides power for 50 riders at one time, w
Whitepunk [10]

Answer:

A power of 29562.1 W is required to operate the tow.

Explanation:

Given:

Angle of inclination (x) = 15.0°

Length of slope (L) = 300 m

Mass of each rider = 70 kg

Number of riders = 50

Speed of rope (v) = 12 km/h

Now, mass of the 50 riders (m) = Mass of 1 rider × Number of riders

                                                    = 70 × 50 = 3500 kg

The force acting on the tow is the component of weight of 50 riders in the direction opposite to the motion of the tow.

The component of weight along the slope is given as:

F_{slope}=mg\sin x=3500\times 9.8\times \sin 15^\circ = 8877.5\ N

Now, the tow must apply the same force in the direction of motion to move it at constant speed.

Now, speed is in km/h. So, we need to convert it to m/s using the conversion factor.

We know that, 1 km/h = 5/18 m/s

Therefore, 12.0 km/h = 12\times \frac{5}{18}=3.33\ m/s

Therefore, the minimum power required to operate the tow is given by the formula:

Power = Force × Velocity

P=8877.5\times 3.33=29562.1\ W

Therefore, a power of 29562.1 W is required to operate the tow.

3 0
3 years ago
A 60 [Hz] high-voltagepower line carries a current of 1000 [A]. The power line is at a height of 50 [m] above the earth. What is
omeli [17]

Answer:

The magnitude of the magneticfield B[T] at a point on the surface of the earth directly below the power line is B=1.496x10^(-6) T.

Explanation:

The distance from the wire to a point in the surface is the heigth of the wire.

The formula for the magnetic field on any point at distance R from a wire conducting alternating current is:

B=\frac{\mu_0I}{2\pi R} =\frac{(4\pi\cdot 10^{-7}T\cdot m/A)(1000\,A)}{2\pi \cdot 50\,m} =1.496\cdot10^{-6}\,T

4 0
3 years ago
Need help for the whole question ​
nevsk [136]

Answer:

a) TAB = 4905[N]; b) TPB = TRB = 4275.8[N]; c) TAB = 43600 [N]; d) N = 8 girders; f) α = 19.54[deg]; g) TAC = 211868.8[N]; h)

Explanation:

This problem is related to the third law of Newton, and we must use the static for the solution of this problem.

a)

For the tension in cable AB, we can make a free body diagram making a cut in the cable and analyzing its internal force. (The free body diagram can be found in the attached image01). Since the velocity is constant there is not acceleration and the sum of forces can be equal to zero.

T_{AB} = 4905 [N]

b)

To find the tension in the cable PR, we need to make a free body diagram of the girder with the cables. (The free body diagram can be found in the attached image01 ), First, we need to make a sum of forces in the x-axis and we can realize that the tension in cables PB and RB are equals, then making a sum of forces in the y-axis we can determine the force in each of the cables.

T_{PB}=4275.8[N] and  T_{RB}=4275.8[N]

c)

The force that will topple the crane, will be the force of the load or enough amount of girders that makes the reaction on the support G equal to zero. Therefore we need to draw a free body diagram with the forces acting in each of the supports (in the attached image02 we can find this analysis).

In this analysis we must have in count all the external forces.

And for the solution we can make a sum of moments around the point H, keeping in mind that the force in the support G is zero.

T_{AB} = 43600 [N]

d)

This analysis is simply because we have the force = 43600 [N], now we divide this value by the gravity and we will have the mass.

m = 43600/9.81

m = 4444.44[kg]

Then dividing this amount between the mass of one girder we can obtain the number of the girders.

N = 4444.44 / 500

N = 8.8 (girders) or with 8 girders will be enough load to avoid the topple of the crane.

e)

For this solution we can dran the jib with all the forces acting over it, the free body diagram can be seen in the attached image03.

f)

This angle can be found using a trigonometric analysis. In the attached image04 we can see two right triangles with blue and red color. So we need to find each of the angles on those two triangles.

For the red triangle we know all the dimensions of its sides, therefore the angle α1, formed between the jib and the clable AB will be equal to:

tan(\alpha _{1} )=\frac{9}{13}\\\alpha _{1} = 34.7[deg]

Now for the blue triangle the horizontal distance will be x = 9 + (4 - 0.5); x = 12.5 [m].

The vertical distance is y = 9 [m]

For the blue triangle we know all the dimensions of its sides, therefore the angle α2

tan(\alpha _{2} )=\frac{12.5}{9}\\\alpha _{2} = 54.24[deg]

Now with those two angles, we can find the angle between the cable AC and the Jib.

α = α2 - α1 = 54.24 - 34.7 = 19.54 [deg]

g)

We need to multiply the 500 kg by 5 and we will have the tension in the cable AB

TAB = 500*9.81*5 = 24525 [N]

With this force we can make the free body diagram on the jib and find the tension in the cable AC, this free body diagram can be found in the attached image05. The angle between the cable AC and cable AB is 54.24.

Then we make a sum of moments in point D to find the tension in the cable AC.

TAC = 211868.8[N]

h)

Because now the movement includes some acceleration and the sum of forces won't be equal to zero, this time all the forces will be equal to the product of the mass by the acceleration, this product will increase the tension in the cables and the stability of the system.

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