chapter 5 flashcards

Question 0

newton

Answer 0

SI unit of force

Question 1

force

Answer 1

a push or pull on a system

Question 2

strong nuclear force

Answer 2

the force that holds proton and neutrons together in nuclei ,strongest force

Question 3

electromagnetic force

Answer 3

attractive ,repulsive force produced by statics and moving charges in atoms

Question 4

weak nuclear force

Answer 4

force exerted between elementary particles of matter within the nucleons,third strongest

Question 5

gravitational force

Answer 5

force exerted by all matter on other matter ,weakest force

Question 6

contact force

Answer 6

force that acts between systems only when one system touches another

Question 7

field

Answer 7

mathematical description of a field force existing in the space surrounding an object that is the source of or is susceptible to the field force

Question 8

field force

Answer 8

noncontact force exerted on a susceptible object by similiar objects

Question 9

balanced force

Answer 9

force that in combination with other forces acting on the same system produces a zero net

Question 10

inertia

Answer 10

tendency of all matter to resist change in motion

Question 11

laws of motion

Answer 11

newtons three laws of motion

Question 12

law of inertia

Answer 12

law stating that objects at rest remain at rest and objects in motion continue in a straight line

Question 13

mechanical equilibruim

Answer 13

condition in which all forces acting on a system are balanced

Question 14

law of accelerated motion

Answer 14

law stating that the accerlation of a system is directly proportional to the net force acting on the system ; Newtons second law of motion

Question 15

action - reaction principle

Answer 15

law stating that for every force exerted on a system by its surroundings ; newton third law of motion

Question 16

friction

Answer 16

contact force that opposes the movement of objects past each other

Question 17

normal force

Answer 17

force exerted by a supporting surface on a object resting on it

Question 18

law of universional gravitation

Answer 18

law stating that the force of gravity between two objects is directly proportional to the products of their masses and inversely proportional to the square of the distance between their centers and mass

Question 19

free fall

Answer 19

condition of an object accelerated by the force of gravity alone with no other forces acting on it

Question 20

gravitational acceleration

Answer 20

acceleration of an object due to gravity

Question 21

uniform acceleration

Answer 21

constant acceleration such as that of an object in free fall

Question 22

drag

Answer 22

form of friction exerted by a fluid on an object moving in relation to the fluid

Question 23

terminal velocity

Answer 23

maximum constant speed of an object falling in the atmosphere

Question 24

momentum

Answer 24

property of a moving object directly proportional to its mass and speed

Question 25

linear momentum

Answer 25

momentum of a system moving in a straight line

Question 26

angular momentum

Answer 26

momentum of a rotating system proportional to the mass of a system ,speed at which it rotates ,and the distribution of the mass in relation to the axis of rotation

Question 27

impulse

Answer 27

chane of a systems momentum directly proportional to the force exerted and the time interval over which the force is applied

Question 28

applied conservation of momentum

Answer 28

fundamental conservation law of mechanics stating that in a system of colliding objects ,the sum of their momentums before the collision is equal to the sum of their momentums afterward if no external forces act on objects