1 / 6

Gravity- Definition, Principle, Calculation & Interesting facts

In 1987, sir Issac Newton discovered gravity while resting under the apple<br>tree.

Dinesh6
Télécharger la présentation

Gravity- Definition, Principle, Calculation & Interesting facts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gravity- Definition, Calculation, Force, Examples & Interesting facts When we throw a ball in the sky, it touches the earth’s surface after traveling some distance. Why? Know how gravity works. In 1987, sir Issac Newton discovered gravity while resting under the apple tree. He figured out the gravity when an apple fell from the tree, thinking why the apple fell instead of going up. He then proposed the theory of gravity known as Newton’s law of gravitation. Read more about gravity in NCERT Solution for class 11 physics. In this article, we deep dive into gravity, calculation, Gravitational Force, and some interesting facts about gravity. Table of Content

  2. ● What is gravity? ● Gravitational Force ● Calculation of gravitational force from Kepler’s law ● Examples of gravity ● Some Interesting facts about gravity ● Advantages and Disadvantages of gravity What is Gravity? The force exerted on the object towards the earth's center is called gravity, or it is a force through which the body attracts towards the center of the planet. In other words, gravity is an invisible force that keeps us grounded. Walking on the earth’s surface, playing on grounds, driving vehicles on roads, etc., are possible due to gravity. Without gravity, we can not survive on the earth’s surface. Gravitational Force As stated, the force exerted on the objects is always towards the earth's center. Gravitational force is the force of attraction between the objects and body directly proportional to the product of their masses and inversely proportional to the square of the distance between them. ?1?2 ?2 F ∝ ?1?2 ?2 F = G

  3. Where F = Gravitational force between the objects and body. & = Masses of the body and objects ?1 ?2 r = distance between the objects 10−11?3??−1 G = gravitational constant. Its value is 6.674× . From the equation, it can be understood the body has mass has gravity. The distance between the objects determines the intensity of gravity. The body with the heavier mass exerts more gravity. NCERT Solution for class 10 science can help you to understand the concept of gravitational force more precisely. Calculating Gravitational force from Kepler’s law Consider a test mass revolving around the body mass in a circular orbit with a radius ‘r’ with the constant angular speed of (ω). Refer to the physics formula to understand Kepler's equation. Now the centripetal force starts exerting force on the test mass. The equation will be ω2 F = mr , And in a circular motion, the centripetal force acting on the test mass will be (2π/?)2 mr × . ?2 ?3 According to Kepler’s 3rd law, ∝ Π2 ?3 F = 4 mr/K /GM] Π2 [Where K = 4

  4. ?2 Equation of newton’s law of gravitation F = GMm/ . Examples of Gravity every day you experience gravity. Here we have picked some daily life examples of gravity. ● Gases present in the sun’s atmosphere is clipped through gravity. ● Due to gravity moon revolves around the earth. ● Moon’s gravity causes tides in the ocean of the earth. ● Due to gravity, we can walk easily on the earth. ● Due to gravitational pull, all the planets revolve around the sun. Some Interesting Facts About Gravity 1. Do you know that the gravitational force is the weakest force among all four forces, but still, it holds a gravitational process for the entire solar system? 2. Einstien stated that gravity is not a force. 3. Change in acceleration in your body causes changes in your weight. 4. If you throw an object at seven miles a second(escape velocity), it will leave the earth’s gravity. 5. Black holes in the universe has the highest gravity. Even light cannot get out from it. 6. If you stand at the center of the earth, you will feel weightless. 7. Gravity has much power. It can bend light.

  5. 8. The speed of gravity is equal to the speed of light. 9. It sounds weird, but the earth’s gravity force is actually weaker than the force on a fridge magnet. 10. Spinning at high speed can create artificial gravity. Advantages and Disadvantages of Gravity Advantages Disadvantages 1. Gravity helps us to walk on the earth’s surface. 1. Due to gravitational pull falling on earth can hurt. 2. Gravity helps us eat properly. 2. Gravity limits the construction of high buildings. 3. Aircraft fly in the sky due to gravity. 3. Due to gravity, high masses of objects are difficult to lift. 4. Measuring weights can be possible with the help of gravity. 4. Gravity makes space objects like Meteoroids fall at very high speeds. 5. Due to gravity moon rotates Around the earth. 5. High amount of thrust is necessary to fly aircraft. Frequently Asked Questions(FAQs) Ques 1. What is gravity? Ans- The force exerted on the object towards the center of the earth is called gravity. Ques 2. What is the universal law of gravitation? Ans- According to newton’s law of universal gravitation, every object in the universe attracts other objects. It is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them.

  6. ?1?2 ?2 F ∝ ?1?2 ?2 F = G Ques 3. What is the earth’s speed of gravity? Ans- The speed of the earth’s gravity is 9.8 meters per second. Ques 4. What is zero gravity? Ans- The place where the effect of gravity does not feel is called zero gravity. Space is an example of zero gravity. Ques 5. Who discovered gravity? Ans- Gravity was discovered by sir Issac newton. Original Source- https://seoslog.com/gravity-definition-calculation-force-exam ples-interesting-facts/

More Related