Anonymous

# how can be found the relationship between cenematics and dynamics laws by kepler's laws?

is it possible to find a relationship between cinematics and dynamics?

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Cinematics? As in making movies? People who make movies can make them so that it appears that any physical laws are violated or changed. Just watch many science fiction movies.

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• Anonymous

i think you mean kinematics and dynamics.

kinematics is a branch of classical physics that describes motion without describing the forces that cause the motion.

dynamics describes the motion but considers the forces that cause the motion.

Kepler's laws are descriptions of kinematic motion.

1.The revolution of every planet is an ellipse with a star at one focus.

2. A line joining a planet and its star sweeps out equal areas during equal intervals of time.

3. The squares of the orbital periods of planets are directly proportional to the cubes of the semi-major axis of the orbits.

now while the laws Kepler's laws don't describe the dynamic forces that cause the behavior we can make certain inference about the dynamic forces.

for instance Kepler's first law can be derived from newtons dynamic law Newton said that every object in the universe attracts every other object along a line of the centres of the objects, proportional to each object's mass, and inversely proportional to the square of the distance between the objects.

keplers second law of kinematic motion can also been seen as being equivalent to the law of conservation of angular momentum.

keplers third law of kinematic motion, can also be seen as being equivalent to newtons law of gravity.

these proofs are very mathematical and you would not be able to duplicate them on yahoo. but newton linked his dynamic laws to keplers kinematic laws.

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