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A 250 kg motorcycle is driven around a 12 meter tall vertical circular track at a constant speed of 11 m/s.

Determine the normal and friction forces at the four points labeled in the diagram below.

1. at the bottom (and rising)

2. halfway to the top

3. at the top

4. 45° past the top

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Circular Motion

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Two particles are attached to a light, inelastic string of length 4a. One particle, P. of mass m, is placed on a large, mooth disc. The string is then threaded through a smooth hole in the centre of the disc. At the other end of the string is the particle Q. of mass 2m. The disc is spinning such that particle does not move and is 1.5a below the centre of the disc. Find the tension in the string, and also find the angular speed of the particle P in terms of a as it moves in cinde

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[OC] 'When the question ask to find the velocity of the satellite'

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[OC] 'When the question ask to find the velocity of the satellite'

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Facts about Circular Motion and Gravitational Force

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Facts about Circular Motion and Gravitational Force

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1. Gravity is by far the weakest of the four fundamental forces. The other three are electromagnetism; weak nuclear force, which governs how atoms decay; and strong nuclear force, which holds atomic nuclei together.

2. Gravity accelerates everything at the same rate, regardless of weight

3. Gravity might be carried by massless particles called gravitons.

4. If the magnitude of velocity of the particle is performing changes continuously the particle is said to perform non- circular motion

5.  In rotational motion the particles on the axis of rotation are stationary, while all the other particles perform circular motion about the axis of rotation.

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The apple of Newton’s eye and the focus of Einstein’s work, gravity is weaker than you probably think and weirder than you probably imagined

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1.Gravity is by far the weakest force we know.
2.Gravity makes waves that move at light speed.
3.Explaining the microscopic behavior of gravity has thrown researchers for a loop.
4.Gravity might be carried by massless particles called gravitons
5.Quantum gravity appears at the smallest length anything can be.

https://www.symmetrymagazine.org/article/six-weighty-facts-about-gravity

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1. Your weight changes as you accelerate
2. Without gravity your body starts to go wrong
3.You would feel weightless at the centre of the Earth
4. Gravity can bend light
5. You can still feel 90 per cent of Earth’s gravity on the International Space Station

Reference:
https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/

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Gravitational force Question

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Interesting Facts on Gravity and Circular Motion!

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Interesting Facts on Gravity and Circular Motion!

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1. Some massive objects can actually make gravitational waves.
2. Gravity can be used to make a space slingshot.
3. Scientists study gravity in cosmic laboratories.
4. If you spin too much, blood in your body will flow less due to centripetal force.
5. Centripetal force can be used in the process of filtration and sedimentation such as extracting sugar crystals from maple syrup.

References:
1. https://interestingengineering.com/5-mind-blowing-facts-about-gravity
2. https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/
3. https://indianapublicmedia.org/amomentofscience/centripetal-force-and-merry-go-rounds.php
4. https://www.separatorsinc.com/blog/centripetal-force-examples

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1. Gravity can bend light
2. Newton wasn't hit by an apple
3. Gravity travels at the speed of light
4. Gravity exist because space-time fabric is warped by a mass
5. Gravity might be carried by massless particles called gravitons

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1. Extreme gravity can tear whole star systems to pieces

2. Gravity isn't actually a force https://interestingengineering.com/5-mind-blowing-facts-about-gravity

3. Gravity is by far the weakest fundamental force known to mankind (compared to electromagnetic, strong and weak forces)

4. Gravity only pulls - it never repels

5. Gravity originated from the Latin gravis (heavy)

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1) Gravity makes stars burn by squeezing the matter together
2) Dark energy works against gravity
3) "gravity" is from the word "gravis" in Latin, means heavy
4) In microgravity, a flame burns in a round shape, and blue in colour
5) Gravity is lumpy, like Earth, gravity isn't evenly

Resource:
1) a book: "1000 things you should know about space"
2)https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/
3)https://blog.assemblrworld.com/fun-facts-about-gravity/
4)https://www.youtube.com/watch?v=9zdD7lfB0Fs

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1. If magnitude of the velocity of the particle performing changing continuously,  the particle is said to perform the non-uniform circular motion. Source: https://thefactfactor.com/facts/pure_science/physics/circular-motion/5271/
2. Gravity is the weakest force we know.
3. Gravity makes waves that move at light speed
Source: https://www.symmetrymagazine.org/article/six-weighty-facts-about-gravity
4. High and low tides are caused by the moons gravity.
Source: https://www.coolkidfacts.com/gravity/
5. Gravity can bend lights
Source: https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/

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1. Unifrom Circular Motion was proved by Newton in ' The Waste Book'
2. All three of Kepler's law follow from Newton's law of mtorion when the law of universal gravitation is used to express the forces between the Sun and the planets.
3. Massive objects make gravitational waves when they move
4. Earth’s gravitational pull is actually weaker than the pull of a fridge magnet
5. Newton works had roots in the work of Galileo and Descartes

Source
1. https://publishing.cdlib.org/ucpressebooks/view?docId=ft4489n8zn&chunk.id=d0e2344&toc.depth=1&toc.id=d0e2344&brand=ucpress
2. http://www.vikdhillon.staff.shef.ac.uk/teaching/phy105/celsphere/phy105_derivation.html
3. https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/
4. https://www.symmetrymagazine.org/article/six-weighty-facts-about-gravity

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Facts!!!
1. Centrifugal force is a fictitious force.
2. Gravitational force is a fictitious force.
3. Gravity is basically mass telling spacetime how to curve and spacetime telling mass how to move.
4. In the standard model of particle physics, graviton is the force carrying particle of gravity.
5. Ripples in spacetime causes gravitational waves that travel at the speed of light ( such as a star collapses to form a black hole ) ( This has been detected by LIGO)

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1.Centripetal means 'center seeking', so centripetal force is used to refer to the force experienced by an object traveling in a circle.
(https://imagine.gsfc.nasa.gov/features/yba/CygX1_mass/gravity/circular_motion.html)
2. We would feel weightless at the centre of Earth
3. Gravity can bend light
(https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/)
4. Some massive objects can actually make gravitational waves
(https://interestingengineering.com/5-mind-blowing-facts-about-gravity)
5. Laboratory centrifuges rely heavily on the centripetal effect
(https://interestingengineering.com/centrifugal-force-and-its-interesting-real-life-applications)

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facts & trivia about gravity and circular motions

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facts & trivia about gravity and circular motions

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1. Extreme gravity (black holes) can tear whole star systems to pieces. https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/

2. Newton and Einstein aren’t the only people to have wondered about gravity. https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/

3. Spinning creates artificial gravity (effect of centripetal force). https://www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/

4. Switch to weightlessness and back can be tough on the body. In the absence of gravity, muscles atrophy and bones likewise lose bone mass. According to NASA, astronauts can lose 1 percent of their bone mass per month in space. https://www.livescience.com/14012-6-weird-facts-gravity.html

5. The lack of gravity in space makes astronauts grow 2 inches. But, when they come back to earth, the earth's gravity will compress their ligaments and undo this growth. https://facts.net/science/physics/gravity-facts/

bonus:

Quantum mechanics and gravity are at odds.

https://interestingengineering.com/5-mind-blowing-facts-about-gravity

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1.Gravity is by far the weakest force we know.
2. Gravity makes waves that move at light speed.
3. Gravity might be carried by massless particles called gravitons.
4. Quantum gravity appears at the smallest length anything can be.
5. Neither loop quantum gravity nor string theory, nor any other theory is currently able to provide testable details about the microscopic behavior of gravity.
Source: https://www.symmetrymagazine.org/article/six-weighty-facts-about-gravity

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Fun facts

1.  Because gravity , we urged to per when our bladder is just 1/3 full.

2. Humans are able to live at a planet, at most 3 times the gravity of earth. Exceed it, and the blood won't flow to the brain

3. Einstein most helpful equation isn't E = mc². It is about gravity, G = 8πT

4. Due to gravity, the tallest mountain can be is 15 km.

5. If the sun was about to gone suddenly, we would still experiencing the gravity and visible effects of sun. In the same sense, the star that we see and and feel the gravity, may have long gone

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Interesting facts on Gravity

1. Gravity isnt actually a force
2. Some massive objects actually make gravitational waves
3. Your favourite fridge magnet is stronger than gravity
4. Gravity on Earth actually varies
5. Quantum mechanics and gravity are at odds

Ref: https://amp.interestingengineering.com/5-mind-blowing-facts-about-gravity

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https://youtu.be/eHQXmXvbMWw

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INTERESTING FACTS ABOUT GRAVITY AND CIRCULAR MOTION.

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INTERESTING FACTS ABOUT GRAVITY AND CIRCULAR MOTION.

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Everything with mass emits force carrier particles called gravitons which help explain why the size of mass and distance is a factor of gravitational field strength

https://www.qrg.northwestern.edu/projects/vss/docs/space-environment/3-mass-and-distance-affects-gravity.html

We are constantly falling!

https://wtamu.edu/~cbaird/sq/mobile/2013/07/01/why-doesnt-the-earth-fall-down/

Black holes are gravitational singularities

https://www.physicsoftheuniverse.com/topics_blackholes_singularities.html

Some galaxies attract each other due to gravity and some move away from each other due to the constant expansion of the universe

https://www.google.com.my/amp/s/public.nrao.edu/ask/are-there-galaxies-that-are-moving-toward-each-other/amp/

Centripetal force is called a fictitious force due to it only existing in a single reference frame

https://youtu.be/Zjqrx7wrpJc

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1. Gravity is by far the weakest force we know.
https://www.symmetrymagazine.org/article/six-weighty-facts-about-gravity

2. You would feel weightless at the centre of the Earth
https://www.google.com.my/amp/s/www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/amp/

3. Sir Isaac Newton’s big idea about gravity was not prompted by a knock on the head. Just seeing an apple fall to the ground was enough to get him thinking.
https://www.google.com.my/amp/s/www.howitworksdaily.com/25-mind-blowing-facts-about-gravity/amp/

4. Centripetal force is considered as artificial gravity to spinning motions
https://www.google.com.my/amp/s/facts.net/science/physics/gravity-facts/%3famp

5. To leave Earth’s gravitational pull behind, an object must travel 7 miles a second, our planet’s escape velocity.
https://www.discovermagazine.com/the-sciences/20-things-you-didnt-know-about-gravity

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How To Have Artificial Gravity In Space?

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How To Have Artificial Gravity In Space?

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1) Linear Acceleration. Based on Einstein's Equivalence Principle: there is no difference between being stationary while being subject to gravity tugging you, and accelerating in a vehicle that's free of gravitational pull.

2) Centripetal Acceleration (Rotating Space Station). It is the normal force provided by the spacecraft's hull that acts as centripetal force. In accordance with Newton's Third Law, the value of little g (the perceived "downward" acceleration) is equal in magnitude and opposite in direction to the centripetal acceleration.

3) Why is gravity important for space travel? The body will subject to wear-and-tear like bone loss and space blindness if there's no gravity.

4)  There's only one type of gravitational "charge," and that's mass-and-energy. The gravitational force is always attractive. Therefore, it's difficult to create artificial uniform gravitational fields in space, in contrast with electric force, which is generated by positive and negative charges.

5) The ALPHA experiment at CERN has created antihydrogen: a stable form of neutral antimatter, and is working to isolate it from all other particles at very low speeds. If possible, we could then measure which way it falls in a gravitational field. If it falls down, the same as normal matter, then it has positive gravitational mass, and we can't use it to build a gravitational conductor. But if it falls up in a gravitational field, that changes everything.