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How could a rich man with a bag of gold trapped in the center of a frozen lake whose surface is so smooth and slippery that it has no friction get off the lake?
He must throw coins directly away from the shore. Since momentum is conserved,
every time he throws a coin away from the shore, his body obtains an equal amount
of momentum toward the shore.
If the friction is really zero, then one coin ought to do the job. But we know that
any little bit of momentum he gets will eventually dribble away because of air
resistance, wind, or microscopic bumps on the ice, so he'll have to keep throwing
coins.
Once he throws away his whole fortune, if he's not off the ice yet, then he must
find more mass to throw. He can throw shoes and clothing, or he can spit away
from the shore, or other innovative and imaginative techniques that may occur
to the reader.
The key is: The poor rich man must throw mass away from the shore.
What else can I help you with?
How do you walk on ice in terms of momentum conservation?
To walk on ice while conserving momentum, focus on minimizing the friction between your feet and the ice by taking slow and deliberate steps. By keeping your center of mass over your base of support, you can maintain stability while walking on the slippery surface. Additionally, using shorter steps and maintaining a low center of gravity can help you adapt to the reduced friction on ice.
What has more pressure the center or surface of the earth?
The center, because that is where all the gravity of Earth pulls you down(this is why when you jump you come down) create lots of friction and pressure
Use of center lathe for Friction welding?
Centre lathe can use for friction welding.
What are the differences between live center and dead center in machining operations?
In machining operations, a live center rotates with the workpiece, reducing friction and heat. A dead center does not rotate and can cause more friction and heat buildup.
What are two forces that affect nearly all motion?
Two forces that affect nearly all motion are gravity, which pulls objects towards the Earth's center, and friction, which opposes the motion of objects moving against a surface.
What is the distance to the center of the earth from the surface?
The distance from the surface of the Earth to its center is approximately 6,371 kilometers.
What is the distance between the surface at the center of a reflective surface and the focal point?
The distance between the surface at the center of a reflective surface and its focal point is equal to half the radius of curvature of the surface.
How does centripetal force overcome friction in circular motion?
Centripetal force is the force that keeps an object moving in a circular path. It acts towards the center of the circle and overcomes the friction between the object and the surface it is moving on. This allows the object to continue moving in a circular motion without sliding or slipping.
What Circle on Earth's surface has the center of Earth as its center?
Any circle on the Earth's surface whose center is at the center of the Earth is called a "great circle". Any circle with its center anywhere else is called a "small circle". Spiritually, many consider the kaaba (Mecca) to be the center of the Earth's surface.
When was National Center for Earth-surface Dynamics created?
National Center for Earth-surface Dynamics was created in 2002.
What is the difference between Radius of curvature and centre of curvature?
The radius of curvature is the distance from the center of a curved surface or lens to a point on the surface, while the center of curvature is the point at the center of the sphere of which the curved surface is a part. In other words, the radius of curvature is the length of the line segment from the center to the surface, while the center of curvature is the actual point.
What is the distance from the surface of the earth to the center in km?
The average distance from Earth's surface at the equator its center is about 6378 km. The distance from near the north and south poles to the center is somewhat less.
