Phys 1210 For Exam 2

Front 1

Law of Universal gravitation
definition

Back 1

every body in the universe attract every other body with a force that, for two bodies, is directly proportional the the product of their masses and iversely proportional to the squre of the distance separating them.

Front 2

Inverse Square law
definition

Back 2

a law relating the intensity of an effect to the inverse square of the distance from the cause. phenomena that follow this law: gravity, electricity, magnetism, light, sound and radiation.

Front 3

weight
definition

Back 3

the force than object exerts on a supporting surface, or if suspended, on a supporting string, which is often but not always due to the force of gravity.

Front 4

weightless
definition

Back 4

being without a support force, as in free fall

Front 5

spring tides

Back 5

high or low tides that occur when the sun, the earth and the moon are all lined up so that the tides (due to the sun and moon coinciding) are higher and lower than their averages.

Front 6

Neap tides
definition

Back 6

tides that occur when the moon is midway between new and full, in either direction. tides due to the sun and moon partly cancel, making the high tides lower than average and the low tides higher than average.

Front 7

gravitiational field
definition

Back 7

the influence that a massive body extends into the space around itself, producing a force on another massive body. it is measured in newtons per kilogram (N/kg).

Front 8

black hole
definition

Back 8

a concentration of mass resulting from gravitational collapse, near which gravity is so intense that no even light can escape.

Front 9

Law of Universal Gravitation

Back 9

F is the magnitude of the gravitational force between the two point masses,
G is the gravitational constant,
m1 is the mass of the first point mass,
m2 is the mass of the second point mass,
r is the distance between the two point masses.

Front 10

Inverse Square Law

Back 10