Module 11 Study Guide (Ps)

Front 1

name the four fundamental forces

Back 1

weak force, strong force, gravitational force, and electromagnetic force

Front 2

what 2 forces are really diff aspects of the same force

Back 2

electromagnetic and weak force

Front 3

weakest of fundamental forces

Back 3

gravitational

Front 4

strongest fundamental force

Back 4

strong force :)

Front 5

three principles of newton's universal law of gravitation (just give it a shot)

Back 5

1. all objects with mass are attracted to one another by the gravational force

2. the gravational force between 2 masses is directly porportional to the mass of each object
3. the gravitational force between two masses is inversely porportional to the square of the distance between those two objects.

Front 6

three principles of newton's universal law of gravitation: (give me the gist)

Back 6

1. all objects are attracted to eachother
2. gravitational force is directly porportional to mass of each
3. you're going to invert and square distance between them to figure amount of force

(all attracted, mass of each matters, invert and square distance for force)

Front 7

force between 2 objects (1st 10kg, 2nd 6kg) measured at distance of 10 cm.

if 10 replaced with a 20kg, and 6 with a 12kg, how does new force compare?

Back 7

(2 x 2) The new gravitational force is 4 times stronger.

Front 8

force between 2 objects (1st 10kg, 2nd 6kg) measured when 10 cm apart.

if distance increased to 40cm, how does new force compare?

Back 8

1/4 squared. it decreases by a factor of 16.

Front 9

force between 2 objects (first 1 kg, second 2kg) measured at distance of 12cm.

1kg mass replaced with 5kg, 2kg replaced with 4kg, AND distance reduced to 4cm... how does new force compare?

Back 9

(5 x 2 x 3squared)
90 times stronger

Front 10

if planet orbits sun because sun exerts gravity on it, what is equal and opposite force required by Newton's third law?

Back 10

planet exerts gravitational force on the sun.

Front 11

what kind of force necessary for circular motion

Back 11

centripetal force

Front 12

definition of centripetal force (include its direction)

Back 12

the force necessary to make an object move in a circle. it is directed perpendicular to the velocity of the object, which means it points toward the center of the circle 00000

Front 13

in hammer throw, guy twirls ball faster and faster... will wire have to apply more, less, or same amount of centripetal force?

Back 13

more

Front 14

three principles of centripetal motion (c'mon, you've got this)

Back 14

1) circular motion require centripetal force

2) the larger the cent. force, the faster an object travels in a circle of a given size

3) at a given speed, the larger the centripetal force, the smaller the circle

Front 15

lets say a ball sweeps out in a circle in the hammer throw but starts to make the circle bigger. will the wire have to exert more, less, or same amount of centripetal force

Back 15

less

Front 16

what is centrifugal force

Back 16

a fictional force

Front 17

if a ball travels in a circle, tell me where the centripetal force would point to

Back 17

it would point the center of the circle,perpendicular to the ball's velocity at a given second

Front 18

inner planets

Back 18

mercury, venus, earth, mars

Front 19

outer planets

Back 19

jupiter, saturn, uranus, neptune

Front 20

list solar system planets in order of closest to sun

Back 20

mercury, venus, earth, mars, jupiter, saturn, uranus, neptune

Front 21

list the planets with rings

Back 21

jupiter, saturn, uranus, neptune

Front 22

where are most of solar system's asteroids?

Back 22

BETWEEN MARS AND JUPITER

Front 23

what causes an asteroid to become a meteor?

Back 23

peturbations in its orbit cause it to be thrown off course into another planet's atmosphere

Front 24

three parts of a comet

Back 24

coma, tail, nucleus

Front 25

what part of a comet is always present

Back 25

nucleus

Front 26

during what part of a comet's orbit are all three of its parts present

Back 26

when its close to the sun

Front 27

comets orbits: circular or elliptical?

Back 27

elliptical

Front 28

where do most physicists think short-period comets come from?

Back 28

the KUIPER BELT

(oort cloud is a theory of where long-period ones come from )

Front 29

what causes gravity according to Einstein's theory of relativity

Back 29

space and time bending from the presence of a massive object

Front 30

what causes gravity according to the graviton theory

Back 30

massive objects moving closer to eachother so they can exchange gravitons in a short time interval