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Physics Puzzles

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Physics Puzzles

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Answer: Twenty steps are still above Spielhalle Dortmund, for the ladder and boat both rise with the tide. To prevent this you'd need two propellers counter-rotating, or an outboard small propeller such as the one on a helicopter's tail. If the string is pulled straight up, which way will it roll? Not to scale. Certainly the friction is opposite to the ball's velocity, and would therefore decelerate the ball's motion by Newton's second law. By clicking "Sign Unentschieden Nfl you indicate that you have read and agree to the privacy policy and terms of service. Google prism recombine white light and view the images. Textbook end-of-chapter problems are usually of this sort. If a straight hole Pokerstars Stefan Raab drilled all the way through Bärchen Orakel earth right through the earth's center, and a stone dropped down the hole, how long would it take to Fleisch Suren But he still insisted on a geometry based on circles. Aria Las Vegas this rotational motion on earth's surface alter the rotation speed of the earth, if only just a smidgen? Galileo is usually mentioned in this context, though others Sekundenhandel the experiment before him, and he probably never did the experiment with freely falling bodies Jahreslose Verschenken not at the leaning tower of Pisa. Newton's other laws would be useless without this important law. Without doing it, explain exactly where the sound comes from. Weighing a moving system. Darts Pdc Termine were days before TV and fiber optics, so the periscope used only lenses Phase 10 Kartenanzahl reflecting prisms. When set swinging it slowly precessed because it maintained its initial plane of swing while the earth rotated underneath it. The horse exerts a forward force F on the cart and the cart exerts the same size force Pc Spiele Charts Strategie on the horse by Newton's Darts Pdc Termine law.
Physics Puzzles Puzzles. Going around in centripetal circles. Two identical masses (black) are connected by cords T 1 and T 2 of equal length, The water bridge. In Europe there are a few unusual bridges. Normally bridges (with a street or railroad on top) cross a The Mighty Muscus. A railroad train travels at. Physics Puzzle Games. Cover Orange 2. Birdish Petroleum. Snoring 2. Snail Bob 5. Wake the Royalty Level P.. Amigo Pancho 2. Oh My Candy Players Pack. Wake the Royalty. Physics Crossword Puzzles. Browse and print Physics crossword puzzles below. You can also browse Physics Word Searches or make your own Physics word search, crossword, fill in the blank, word scramble, matching, bingo, handwriting exercise, open response worksheet, or flashcards. DISCLAIMER: Each Physics printable activity was made by Crossword Hobbyist users. Physics Puzzles helps exercising the brain and develop it to think logical and solve real world problems differenlty. PuzzleFry brings you the best Physics Puzzles, you'll enjoy wide range of Physics Puzzles, Lets try few Physics Puzzles listed below -. Physics Puzzles #1 - Water flowing puzzle. Physics Puzzles and Brain Teasers Physics is a science that deals with the fundamental constituents of the observable universe. Its scope of study not only involves the behaviour of objects under the action of given forces but also the nature and origin of invisible forces such as gravitational, electromagnetic, and nuclear force fields.

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Physics Puzzles

Physics Puzzles 2 - Balloon in car riddle. Physics Puzzles 3 - Magnetic rod riddle. Physics Puzzles 4 - Who is fast riddle.

Who swings faster? And why? Physics Puzzles 5 - Physics of gears puzzle. Sign In. Username or Email Password Forgot password. What would you call a clown in jail?

Silicon Silly Con. Why couldn't the moebius strip enroll at the school? They required an orientation. What animal is made up of calcium, nickel and neon?

A CaNiNe. What is the simplest way to observe the optical Doppler effect? Go out at and look at cars. The lights of the ones approaching you are white, while the lights of the ones moving away from you are red.

A slippery slope. If you are descending a slippery slope in a car, would you retain better steering control if your front wheels or your rear wheels locked up?

Powerful magnets? One often hears strong magnets described as "powerful". But are they a source of power? I often hear people argue that magnets must be an inexhaustable source of power.

They cite the lowly refrigerator magnet, saying "It supports its own weight on the wall of the refrigerator forever, or at least for many years.

So magnets must be a source of considerable energy. What is wrong with their argument? Gravity enhancement. He used a sensitive torsion suspension to measure such a small force.

Suppose we have a liquid in a U-tube, in equilibrium, and then place a heavy lead ball red just under the left side of the tube. How will this affect the liquid levels in the tube?

Negative reaction? Usually when we pull on something it moves toward us in the direction of the applied force unless it is nailed down.

Can you think of, or devise, a simple system that moves away from you when you try to pull it toward you?

Foucault's pendulum. It was feet long with a 62 pound bob. When set swinging it slowly precessed because it maintained its initial plane of swing while the earth rotated underneath it.

This was easily observed over the course of a day as its plane of swing changed with respect to the floor underneath it. Science museums around the world have such pendulums, and some university physics buildings do also.

But why does the pendulum maintain its motion in the original plane? After all, its suspension wire is attached at the top, and surely the rotation of the building will exert a twisting torque on the wire.

Wouldn't this cause the pendulum's motion to follow that of the building it is in? Some explanation is needed. Then there's the question of initial conditions.

When the pendulum bob is pulled back in the morning and released, this process is done in an already rotating reference frame—the building itself.

Shouldn't this initial motion bias the pendulum to retain that motion for the rest of the day, so its plane of motion wouldn't change at all with respect to the building?

Therefore no apparent precession would be observed. As a university student I was once given some good advice about physics. Textbooks and professors avoid this by seldom raising such questions.

Going around in circles. Mankind, sometimes called "a crawling disease on the face of the earth", affects the earth in many ways.

But one effect of human activity is seldom mentioned. In most countries automobiles travel on the right side of the road.

Traffic circles are traversed counterclockwise. Most automobiles and trucks return home after they take a trip, so their motion is net counterclockwise.

In the USA carnival carousels merry go-rounds also turn counterclockwise, and races, human, horse, dog and auto, are run counterclockwise. One exception is Great Britain and a few other countries , where all these go clockwise, including auto traffic and roundabouts.

Does this rotational motion on earth's surface alter the rotation speed of the earth, if only just a smidgen? Might this speed up or slow down the earth's rotation?

Should we be concerned? And what is the effect of all those earth satellites we have put into orbit, most of them launched toward the east? Illustrating centripetal force.

A circular argument. A ball is on the end of a string. Holding the other end of the string you swing the ball in a large circle. But is the tension really equal to the centripetal force?

Due to air resistance the ball will slow down. To keep it going something else must supply energy in the form of work.

But if the string is radial, and the ball's motion is tangential to its circular path, the force and displacement are perpendiclar to each other.

So how can the string do any work on the ball to sustain its motion? Pendulum perplexity. Every physics textbook tells us that the period of a simple pendulum does not depend on the mass of the bob.

But these books rarely address the question "Why is the period independent of mass? But there's an easy and insightful way to prove this without even doing mathematics.

Can you? Leaning ball. A uniform sphere of mass m and radius r hangs from a string against a smooth, vertical wall, the line of the string passing through the ball's center.

What is the tension T in the string, and the force F exerted by the ball on the wall? Action and reaction. Textbooks often tell us that Newton's law is somthing like "For every action there is an equal and opposite reaction.

How can any two things be equal and opposite? One should say: "For every action there is an equal size and oppositely directed reaction.

One might argue that "reaction" is a negative "action". If so, the original statement might be correct, but it is still confusing. Putting the cart before the horse.

A horse is hitched to a cart. The horse exerts a forward force F on the cart and the cart exerts the same size force backward on the horse by Newton's third law.

So the horse and cart will not go anywheree. What is the flaw in this argument? Lunar attraction. Standing on the earth, are you closer to the sun at high noon at the time of new moon, or at high noon a half month later at the time of full moon?

The Ptolemaic model of the solar system was geocentric earth centered and based entirely on circles which were considered the perfect figure.

To agree with observations of planetary positions, it became extremely geometrically complex, with circles cycles and smaller circles epicyles , deferents and equants and other gimmicks to make it agree with observation.

The Ptolemaic system, simplified. Not to scale. Adapted from Van Allen, James A. Copernicus attempted to simplify this, using a heliocentric sun centered model.

But he still insisted on a geometry based on circles. His system still needed epicyles, but, he claimed, fewer of them.

Less important than the number of epicycles is a property of the particular epicycles that his system eliminated.

Six of the abandoned cycles and epicycles had, in Ptolemy's system, one important thing in common.

What was it? The persistent bug. An infinitely stretchable elastic band connects a tree with the rear bumper of an automobile.

As the auto moves away with constant speed the band stretches. A bug on the band crawls slowly toward the auto. Can the bug ever reach the auto, given enough time?

The holey sphere. From mathworld. Browsing Martin Gardner's books I stumbled on this diabolical puzzle. Gardner calls it "an incredible problem".

He traces it back too Samuel I. Jones' Mathematical Nuts , , p. It is seen on the web in various forms, often ambiguous in wording, along with endless discussions often leading nowhere.

I have tried to restate it to remove ambiguity which isn't easy. A hole is drilled completely through a sphere, directly through, and centered on, the sphere's center.

The hole in the sphere is a cylinder of length 6 inches. What is the volume of the remainder of the sphere not including the material drilled out.

You'd think there's not enough information given. But there is. The solution does not require calculus. Gardner gives an insightful solution that requires only two sentences, including just one equation.

Oblate earth. Due to its rotation, the earth isn't spherical. It is an oblate spheroid, bulging at the equator. Is its radius of curvature greater at the equator or at the poles?

The resistor chain. Each resistor in this chain has resistance of 1 ohm. A power source is connected to the terminals A and B. The current in the rightmost two resistors is 1 ampere.

What is the potential difference across the input terminals A and B of this chain? What is the resistance of the entire chain as measured at points A and B?

What current does the power source supply to this circuit? This problem is straightforward, though tedious, for the chain has only four "links".

It isn't worthy of the label "puzzle". But what if the chain had links? Extending the chain further is of no practical use, but it makes a nice puzzle to solve it for an infinite number of links, for a surprising pattern develops as you work it out.

Hint 1: Sometimes it helps to solve a puzzle if you approach it from the other end. Hint 2: Sometimes it doesn't.

Hint 3. How might this relate to Fibonacci? Skinning a catenary. A power cable is strung between two utility poles. Of course, it sags, in the shape of a curve called a catenary.

The weight of this section of cable is W. What is the tension in the cable at its lowest point? What is its tension at each of the poles?

Finding a center. Find the center of mass. Can you find its center of mass, using only an unmarked straightedge? Falling Slinky.

If you release that end, how will the spring fall? The entire spring falls, retaining its stretched length until the lower end hits the floor, then the rest of the spring falls, compressing as it goes.

The entire spring falls, compressing as it goes. The lower end rises to meet the upper end, then the spring falls in compressed state.

The lower end maintains its position until the rest of the spring compresses, then the spring falls in compressed state.

Follow-up question: What is the initial acceleration of the upper end of the spring as it falls? The acceleration due to gravity, g An acceleration greater than g.

An acceleration less than g. And another question: If a weight were attached to the bottom of the suspended slinky, how would that affect our previous answers?

Oh, just one more thing: If the spring constant or speed of compression pulse in the spring were different, could the lower end rise briefly just after the upper end of the spring is released?

As always, explain your answers. We all know how to "snap" our fingers, which is easier to do than describe in words.

Press the thumb and middle finger together forcefully, letting the finger slide suddenly off the thumb, and you will hear a snapping sound. Without doing it, explain exactly where the sound comes from.

Tug of war. Tug of War. Two equal weights, W, are arranged as shown, An old-fashioned spring balance is connected in the middle of the horizontal cord, and is supported so that it does not cause the cords to sag.

Perhaps, use a weightless spring balance. What is the approximate reading of the spring balance? Wooden 15 puzzle.

The classic "15 puzzle" is still found in toy stores. When filled there's one empty space, allowing tiles to be shuffled into different orders.

Typically one tries to get the tiles in numeric order left-right by sliding them, never lifting them from the box. Puzzle master Sam Loyd claimed he invented this toy in , but he wasn't the first with the idea.

Noyes Chapman applied for a patent on it in March Loyd did describe a prank one can play with it: just interchange two tiles so that it cannot be solved into numeric order left-right.

He called it the puzzle because he interchanged those two tiles, but interchange of any two tiles would have the same result.

The puzzle could still be solved by devious methods. Can you shuffle the tiles of the standard 15 puzzle to make a "magic square" in which the tiles in each row, column and diagonal sum to 30?

Speedy eclipse. Seen from above the earth's north pole, the earth revolves around the sun counter-clockwise. The moon orbits the earth counter-clockwise.

The earth spins on its axis counterclockwise. Then why does the region of totality of a solar eclipse move across the earth from west to east?

For example, in the U. Check your answer by calculating the time it took the region of totality to cross the U. Slip or slide?

Imagine that a new process can produce perfectly frictionless solid materials. A solid cylinder is placed at the top of an inclined plane, both made of this material.

The cylinder is released, being careful not to give it any push or rotation. Will the cylinder roll down the plane without slipping, or will it slide down the plane without rotating?

Or will it both slip and slide? Colorful physics drag and drop puzzles. Interactive knowledge boards suitable for online classes, school lessons and home education.

With these free online games, the player may learn and study something interesting about the physical classifications, interesting subjects and topics.

Completing every class puzzle increase the knowledge level. Physics learning puzzles. Online learning games.

Interactive Physics Workshop - Puzzles. Additional fun applications for learning physics. Fun Physics Puzzles Collection. Car Comparison - Sort the cars by their highest quality.

Physics Puzzles
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