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Vaselesa [24]
3 years ago
7

determine the angle and the magnitude of force f so that the resultant force acting on the post is directed vertically upward an

d has a magnitude of 750 n

Physics
2 answers:
xenn [34]3 years ago
5 0

Answer / Explanation:

To solve this question,

Let us recall the Sine Rule and assuming we have an angle of θ.

Then it states thus:

sin θ / 750

Therefore, Sin 30⁰/ 700

: θ / 750 = Sin 30⁰/ 700

θ = 36.87  

Now that we have θ, we can figure out ∅

Therefore,

∅ = 180°  − (30 °  + 36.87° )

Recalling that all interior angles in a triangle must add up to 180°

Therefore,

∅ = 113.13°

Now that we have both θ and ∅, we can go further to use the law of sines to find Fr.

Therefore,

Fr/Sin 113.13° = 700 / Sin 30 °

Fr = 919.61 Newton

Vlad1618 [11]3 years ago
4 0

Answer:

The force F = 318 and the angle 18.5°. The first thing to do is to resolve the forces into components along the x and y-axis and then equate it to Rx and Ry. R has no component along the x-axis since it is directed along the y-axis.

Explanation:

The detailed solution can be found in the attachment below. Thank you for reading.

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If he feels the chances of low, normal, and high precipitation are 30 percent, 20 percent, and 50 percent respectively, What is
Brilliant_brown [7]

Question:

The operations manager for a well-drilling company must recommend whether to build a new facility, expand his existing one, or do nothing. He estimates that long-run profits (in $000) will vary with the amount of precipitation (rainfall) as follows:

Alternative             Precipitation                                

                        Low                Normal                 High

Do nothing    -100                       100                    300

Expand           350                       500                   200

Build new       750                       300                    0

If he feels the chances of low, normal, and high precipitation are 30 percent, 20 percent, and 50 percent respectively, What is EVPI (Expected value of Perfect Information)?

A. $140,000

B. $170,000

C. $285,000

D. $305,000

E. $475,000

Answer:

D. $170,000

Explanation:

The expected long run profits are  for

                        Low                Normal                 High

Do nothing    -100*0.3                100*0.2                   300*0.5 = 140

Expand           350*0.3                500*0.2                  200*0.5 = 305

Build new       750*0.3                300*0.2                  0*0.5    = 285

Therefore the expected long run profits are

$140,000

$305,000

$285,000

Based on his selected option being either to build new or to expand, the most profitable option is to expand

=$305,000

EVPI = EPPI-EMV =$170,000

7 0
3 years ago
A cliff jumper jumps off a cliff with an initial horizontal velocity of 10 m/s. The cliff is 10 meters high. How far from the ba
nalin [4]

Answer:

The distance reached is 14.3 m.

Explanation:

To find the distance reached by the diamond first we need to find the flight time:

t_{v} = \sqrt{\frac{2h}{g}}

Where:

h: is the height = 10m

g: si the gravity = 9.81 m/s²

t_{v} = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2*10 m}{9.81 m/s^{2}}} = 1.43 s

Now, we can find the distance reached:

x = V_{0_{x}}*t_{v}

Where:

V_{0_{x}} is the initial horizontal velocity = 10 m/s

x = V_{0_{x}}*t_{v} = 10 m/s*1.43 s = 14.3 m

Therefore, the distance reached is 14.3 m.

I hope it helps you!    

3 0
3 years ago
How could you increase gravitational force using each factor?
jeka94
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.
5 0
3 years ago
3. Force = _____ x _____?
harkovskaia [24]

Answer:

Explanation:

Force = mass * acceleration.

8 0
3 years ago
If the range of a projectile is and 256√3 m in the maximum height reached is 64 m. calculate the angle of projection​
yawa3891 [41]

The angle of projection given that the range is 256√3 m and the maximum height reached is 64 m is 30°

<h3>Data obtained from the question</h3>
  • Range (R) = 256√3 m
  • Maximum height (H) = 64 m
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Angle of projection (θ) = ?

<h3>How to determine the angle of projection</h3>

R = u²Sine(2θ) / g

256√3 = u²Sine(2θ) / 9.8

Cross multiply

256√3 × 9.8 = u²Sine(2θ)

Divide both sides by Sine(2θ)

u² = 256√3 × 9.8 / Sine(2θ)

H = u²Sine²θ / 2g

64 = [256√3 × 9.8 / Sine(2θ)] × [Sine²θ / 2 × 9.8]

64 = [256√3 / Sine(2θ)] × [Sine²θ / 2]

Recall

Sine²θ = SineθSineθ

Sine2θ = 2SineθCosθ

Thus,

64 = [256√3 / 2SineθCosθ] × [SineθSineθ / 2]

64 = 256√3 × Sineθ / 4Cosθ

Recall

Sineθ / Cosθ = Tanθ

Thus,

64 = 256√3 / 4 × Tanθ

Divide both side by 256√3 / 4

Tanθ = 64 ÷ 256√3 / 4

Tanθ = 0.5774

Take the inverse of Tan

θ = Tan⁻¹ 0.5774

θ = 30°

Learn more about projectile motion:

brainly.com/question/20326485

#SPJ1

5 0
2 years ago
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