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Mystery Spot and Physics

Mystery spot is a tourist attraction located near Santa Cruz , California. It is a place where the laws of physics and gravity do not apply.
The Mystery Spot is a gravity hill, a tilt indused visual illusion. In the tilted room of the mystery spot , misperceptions of the height and orientation of objects occur. Explain.

(Asked by G Saranya)

Answer:

The question on gravity hills (also called magnetic hills) is already answered. Please refer to http://askphysics.com/gravitation/magnetic-hills-gravity-hills/

A few numerical problems from laws of motion

  1. A worker pulls a 200. N packing crate with an applied force of 55.0 N.  The crate accelerates at a rate of 0.250  m/s(squared).  What is the coefficient of kinetic friction between the crate and the factory floor?
  2. A student pulls a 150. N sled up a 28 degree slope at a constant speed by applying a force of 100. N.  Near the top of the hill he releases the sled.  With what acceleration does the sled go down the hill?
  3. A 200. N crate rests on a ramp; the maximum angle just before it slips is 25 degrees with the horizontal.  What is the coefficient of static friction between the crate and the surface of the ramp?
  4. A man pulls a sled with a weight of 200. N with a constant velocity across a horizontal snow surface.  If a force of 80N is being applied to the sled rope at an angle of 53 degrees to the ground, what is the coefficient of friction between the sled and the ground?
  5. A jet plane is flying with  a constant speed along a straight line at an angle of 30degree  above the horizontal. The weight of plane is 86 500N. Its engine provides a forward thrust T of 103 000N. The lift of force L(directed perpendicular to the wings)and the force R of air resistance (directed opposite to the motion)act on the plane. Find L & R

MAGNETIC HILLS & GRAVITY HILLS

AMRITHA ASKED
“Sir, is it true that in magnetic hill in Ladhak defies gravity? If so, Why?”
ANSWER:
The “magnetic hill” is located on the Leh-Kargil-Batalik national highway, about 30 km from Leh, at a height of 14,000 feet above sea level. On its eastern side, flows the Indus, which originates in Tibet and goes to Pakistan. The Indian Army maintains a sikh Gurudwara near the hill where Guru Nanak Dev, meditated in the 17th century.[citation needed] Due to both the Gurudwara and the gravity hill, the area has become a popular sightseeing destination.
The hill is alleged to have magnetic properties strong enough to pull cars uphill and force passing aircraft to increase their altitude in order to escape magnetic interference; in reality, the effect is an optical illusion created by the gravity hill.
The slope of gravity hills is an optical illusion, although sites are often accompanied by claims that magnetic or even supernatural forces are at work.
The most important factor contributing to the illusion is a completely or mostly obstructed horizon; without a horizon, judging the slope of a surface is difficult as a reliable reference is missing. Objects one would normally assume to be more-or-less perpendicular to the ground (such as trees) may actually be leaning, offsetting the visual reference. The illusion is similar to the well-known Ames room, in which balls can also appear to roll against gravity.
SOURCE: WIKIPEDIA

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