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Zarrin [17]
3 years ago
14

Which statement about gravity is true?

Physics
1 answer:
SVETLANKA909090 [29]3 years ago
5 0

Out of the given options, ‘it is described as a fundamental force and therefore does not depend on other forces’ is the true statement about gravity.

Answer: Option B

<u>Explanation: </u>

As we all know that there are four fundamental forces existing in the universe- Electromagnetic force, strong forces, weak forces and the gravitational force.

These are the forces that don’t depend on any other physical force to draw a considerable impact on the physical objects. The gravitational force can be defined as,

                     F=G \times \frac{m_{1} m_{2}}{r^{2}}

Where,

G = Gravitational Constant

m_{1} , m_{2} = Masses of two substances under consideration

R = distance between the two substances.

Looking upon the formula of gravitational force we can easily estimate that the gravitational force relies on the mass of substances and the relative distance between them. There is no factor than the air friction that hinders the gravitational force and that too in a negligible amount.

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A horizontal clothesline is tied between 2 poles, 12 meters apart. When a mass of 1 kilograms is tied to the middle of the cloth
nadya68 [22]

Answer:

The  tension on the clotheslines is  T  = 8.83 \ N

Explanation:

The  diagram illustrating this  question is  shown on the first uploaded image

From the question we are told that  

    The distance between the two poles is  d =  12 \ m

     The mass tie to the middle of the clotheslines m  =  1 \ kg

     The length at which the clotheslines sags is  l  = 4 \ m

Generally the weight due to gravity at the middle of the  clotheslines is mathematically represented as

          W =  mg

let the angle which the tension on the  clotheslines makes with the horizontal be  \theta which mathematically evaluated using the SOHCAHTOA as follows

        Tan  \theta =  \frac{ 4}{6}

=>     \theta =  tan^{-1}[\frac{4}{6} ]

=>     \theta  =  33.70^o

   So the vertical component of this  tension is  mathematically represented a  

      T_y  = 2*  Tsin \theta

Now at equilibrium the  net horizontal force is  zero which implies that

          T_y  -  mg  = 0

=>       T sin \theta  -  mg  =  0

substituting values

          T  =   \frac{m*g}{sin (\theta )}

substituting values

           T  =   \frac{1 *9.8}{2 * sin (33.70 )}

           T  = 8.83 \ N

6 0
3 years ago
Two balls move away from each other, both traveling at 7 m/s. One has a mass of 2 kg and the other has a mass of 3 kg
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A 300-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the
tree and the bear is
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Expansionary monetary policies would likely cause
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Answer:

TRUE

Explanation:i've seen one and please make me the brainlest

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If mr galans paces is equal to 1.8 m,how many paces would it take to get to the moon
Anettt [7]

Answer:

The number of paces it would take to get to the Moon is 213,555,556 paces

Explanation:

The given length of Mr Galan's paces = 1.8 m/pace

The distance from the Earth to the Moon is, 384,400 km = 384,400,000 m

Therefore, the number of paces, "n", it would take to get to the Moon from the Earth is given as follows;

n = (The distance from the Earth to the Moon)/(The length of each Mr Galan's paces)

∴ n = 384,400,000 m/(1.8 m/pace) = 213,555,556 paces

The number of paces it would take to get to the Moon = n = 213,555,556 paces

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slavikrds [6]

Answer:

0.5

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