Chapter 2 Newton's 1St Law

Front 1

who stated that the earth revolves around the sun

Back 1

nicholas copernicus

Front 2

define friction

Back 2

force that acts to resist the relative motion or attempted motion of the objects to materials that have in contact

Front 3

what were 2 classes of motion that Aristotle spoke of?

Back 3

natural motion, and violent

Front 4

define the 2nd motion

Back 4

natural motion- proceeds from nature every object has a proper place

Front 5

law of Inertia

Back 5

property that every material has, inertia resists change in an objects state of motion.

Front 6

force

Back 6

a push or a pull

Front 7

when does friction act

Back 7

opposite of the objects motion

Front 8

what does the law inertia apply to
( everything)

Back 8

both moving and non- moving objects

Front 9

how does mass relate inertia

Back 9

more mass = more inertia

Front 10

describe newton's 1st law, include the relationship between the earth moving and objects on it seemingly stand still

Back 10

the moving earth

Front 11

what is the force that explains why a book on a table stays still?

Back 11

equlibrium and gravity

Front 12

if a 10g objects is still on a table, how much force does the table exert to keep it still

Back 12

10ng

Front 13

when does equilibrium occur

Back 13

when all of the forces acting on an object are balanced the net force on the object is zero the sum of the upward force equals the sum of the downward force

Front 14

what is the net force of a 10N force in the same direction of a 20 N force

Back 14

30 N

Front 15

define a vector quantity

Back 15

arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.

Front 16

study diagram

Back 16

net force- you will need to fill in the values and diagram

Front 17

why is a force needed to change an object's state of motion

Back 17

accoording to newtons first law a body remains in constant motion in the same direction with the same velocity unless and until an external forces acts on it. so when a body of motion comes under the influence an external force it either 1 changes in directions in its speed- accelerate or 2 changes in direction of motion - like when rolling marbles collide with each other and change direction 3 both of the above changes take place and when a body is in the state of resist will remain in rest and until acted upon by an external force in the " ( bod)"at rest will stay at rest and a body moving at a constant velocity in a straight line continues doing so indefinitely

Front 18

the equilibrium rule, including static and dynamic equilibrium

Back 18

whenever the net force on an object is zero the object is in mechanical equilibrium- this is know as the equilibrium rule, state of no change. dynamic equilibrium- when an object moves at a steady pace in a straight line. static equilibrium a state of rest

Front 19

Aristotle's beliefs discoveries

Back 19

Aristotle's 2 types of motion all objects have their place or strive to get there all motion due to sustained push or pull- earth does not move

Front 20

describe Copernicus beliefs discoveries

Back 20

Copernicus- assumed that earth and other planets move around the sun

Front 21

Describe Galileo's beliefs/ discoveries

Back 21

in the absence of opposing forces a moving object will continue to move indefinitely how concept of inertia discredited the Aristotelian theory of motion.