Physics

Question 1

quantity that involves both magnitude and direction

Answer 1

vector

Question 2

qty that does not involve direction

Answer 2

scalar

Question 3

are the mathematical tools for describing motion in terms of displacement, velocity, and acceleration

Answer 3

kinematics

Question 4

location in a certain space

Answer 4

position

Question 5

an object’s change in position

Answer 5

displacement

Question 6

ratio of the total distance traveled to the time required to cover the distance

Answer 6

speed

Question 7

rate of change of its position with respect to a frame of reference

Answer 7

velocity

Question 8

rate of change of an object’s velocity

Answer 8

acceleration

Question 9

two possible directions of motion

Answer 9

positive and negative

Question 10

motion of objects in earth’s gravitational field

Answer 10

free fall

Question 11

an object upon which the only force is gravity

Answer 11

projectile motion

Question 12

philosphiae naturalis pirncipa mathematica

Answer 12

the mathematical principles of natural philosophy

Question 13

what began the modern study of physics

Answer 13

principia

Question 14

a push or a pull

Answer 14

force

Question 15

an object will continue in its state of motion unless compelled to change by a force impressed upon it

Answer 15

inertia

Question 16

when an unbalance forced does act on an object

Answer 16

acceleration

Question 17

to every action, there is an equal but opposite reaction

Answer 17

interaction

Question 18

is the gravitational force exerted on the object by earth

Answer 18

weight

Question 19

a measure of the quantity of matter that comprises an object

Answer 19

mass

Question 20

a component of the contact force that is perpendicular to the surface

Answer 20

normal force

Question 21

when an object is in contact with a surface, the surface exerts a contact force on the object

Answer 21

contact force

Question 22

component of the contact force that’s parallel to the surface

Answer 22

friction

Question 23

results from the weak electrostatic bonds formed between the surfaces when the object is at rest

Answer 23

static friction

Question 24

devices that change the direction of the tension force in the cords that slide over them

Answer 24

pulley

Question 25

pulley that does not move | mounted

Answer 25

fixed pulley

Question 26

can move because it is not mounted

Answer 26

movable pulley

Question 27

at least one fixed and one movable pulley

Answer 27

compound pulley

Question 28

ramp

Answer 28

inclined planes

Question 29

energy can be converted in form, but not created nor destroyed

Answer 29

law of conservation of energy

Question 30

agent of energy's change

Answer 30

force

Question 31

measure of change of force | ability to do work

Answer 31

energy

Question 32

method of transferring energy from one system to another

Answer 32

work

Question 33

basic property of matter carried by some elementary particles that governs how the particles are affected by an electric or magnetic field

Answer 33

electric charge

Question 34

one of the most powerful forces in nature

Answer 34

electromagnetic force

Question 35

an electric property associated with each point in space when charge is present in any form

Answer 35

electric field

Question 36

flow of electric charge in a current

Answer 36

electric current

Question 37

what creates current | the pressure from an electrical circuit's power source that pushes charged electrons through a conducting loop

Answer 37

voltage

Question 38

path for transmitting electric current

Answer 38

electric circuits

Question 39

time rate of doing energy | rate at which work gets done

Answer 39

power

Question 40

three basic elements of a circuit

Answer 40

batteries, resistors, wires

Question 41

a form of energy that an object or a particle has by reason of its motion

Answer 41

kinetic energy

Question 42

a system gains or loses kinetic energy by transferring it through work between the environment and the system

Answer 42

work-energy theorem

Question 43

independent of motion | arises from the object's position

Answer 43

potential energy

Question 44

the sum of potential and kinetic energies | dissipated or converted into another energy forms such as heat

Answer 44

mechanical energy

Question 45

quantity of motion that an object has | product of mass and velocity

Answer 45

linear momentum

Question 46

product of force and time during which it acts | equal to change in linear momentum

Answer 46

impulse

Question 47

an impulse that is delivered on an object changes its momentum

Answer 47

impulse-momentum theory

Question 48

the momentum before equals the momentum after

Answer 48

conservation of linear momentum

Question 49

the sudden forceful coming together in direct contact of two bodies

Answer 49

collisions

Question 50

motion of an object in a circle at a constant speed

Answer 50

uniform circular motion

Question 51

any two objects in the universe exert an attractive force on each other called the gravitational force whose strength is proportional to the product of the object's masses and inversely proportional to the square of the distance between them as measured from center to center

Answer 51

newton's law of gravitation

Question 52

allows for cars to travel around a curve at or below the posted speed limit, without relying on friction between the tires and the road

Answer 52

banking

Question 53

the motion of a rigid body which takes place in such a way that all of its particles move in circles about an axis with a common angular velocity

Answer 53

rotational motion

Question 54

is a position defined relative to an object or system of objects it is the average position of all the parts of the system, weighted according to their masses

Answer 54

center of mass

Question 55

when the sum of the forces acting on an object is zero

Answer 55

equilibrium

Question 56

a disturbance transmitted by a medium from one point to another, without the medium itself being transported

Answer 56

waves

Question 57

perpendicular to the wave

Answer 57

transverse travelling waves

Question 58

parallel to the wave

Answer 58

longitudinal waves

Question 59

maximum vertical displacement above

Answer 59

crest

Question 60

maximum vertical displacement below

Answer 60

trough

Question 61

when to or more waves meet, the displacement at any point of the medium is equal to the algebraic sum of the displacement due to the individual waves

Answer 61

superposition waves

Question 62

combination of two waves moving in opposite directions each having the same amplitude and frequency

Answer 62

standing waves

Question 63

produced by the vibration of an object

Answer 63

sound waves

Question 64

how many hz are heard by the human ears

Answer 64

20-20,000 hz

Question 65

molecules of the medium are bunched together

Answer 65

compressions

Question 66

positions where the pressure is below normal

Answer 66

rarefractions

Question 67

when two soundwaves whose frequencies are close but not identical interfere, the resulting sound modulates in amplitude, becoming loud, then soft, then loud, then soft

Answer 67

beats

Question 68

number of beats per second

Answer 68

beat frequency