Newton's Law of Universal Gravitation

Newton’s Law of Universal Gravitation

every particle in in the universe attracts every other particle with the force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them

angular displacement

the angle made by the body from its point of rest at any point in the rotational form

radian

the angle at the center of a circle that subtends an arc whose length equals the radius of the circle

rotation

the circular motion of an object around a central line

revolution

the circular motion of an object around an external axis

angular acceleration

the ratio of the change in the angular speed to the time it takes for the object to undergo the change

angular speed

the ratio of the angular displacement to the time interval

Kepler’s first law

all planets move in elliptical orbits with the sun at one focus

Kepler’s second law

a line drawn from the sun to any planet will sweep out equal areas in equal time

Kepler’s third law

the square of the orbital period of any planet is proportional to cube of the average distance from the sun to the planet