physics

Question 1

SI units include …

Answer 1

• meter
• kilogram
• second
• ampere
• mole
• kelvin
• candela

Question 2

physical quantities with BOTH magnitude and direction

Answer 2

what are vectors?

Question 3

vector qualities include …

Answer 3

• displacement
• velocity
• acceleration
• force

Question 4

quantities with magnitude, but NO direction

Answer 4

what are scalars?

Question 5

scalar quantities include …

Answer 5

• speed
• coefficient of friction

Question 6

use pythagorean theorem to break vector into components

Answer 6

vector addition

Question 7

change the direction of the subtracted vector, then use pythagorean theorem

Answer 7

vector subtraction

Question 8

multiplying vector by scalar changes _

Answer 8

magnitude

Question 9

result of multiplying two vectors using dot products

Answer 9

scalar quantity

Question 10

result of multiplying two vectors using cross product

Answer 10

vector quality

Question 11

product of vectors’ magnitudes and cosine of angle

Answer 11

what is dot product?

Question 12

product og vectors’ magnitudes and sine of angle

Answer 12

what is cross product?

Question 13

vector representation of a change in position

Answer 13

what is displacement?

Question 14

displacement is _ of path

Answer 14

independent

Question 15

_ equals straight line distance between start and end positions

Answer 15

displacement

Question 16

scalar quantity reflecting oath traveled

Answer 16

what is distance?

Question 17

(vector) change in displacement with respect to time

Answer 17

what is velocity?

Question 18

total displacement divided by total time

Answer 18

what is average velocity?

Question 19

total distance divided by total time

Answer 19

what is average speed?

Question 20

limit of the change in displacement over time (as time approaches 0)

Answer 20

what is instantaneous velocity?

Question 21

magnitude of instantaneous velocity vector

Answer 21

what is instantaneous speed?

Question 22

any push or pull; has potential to result in acceleration

Answer 22

what is force?

Question 23

attractive force that opposes motion as a function of electrostatic interactions at surface between two objects

Answer 23

what is friction?

Question 24

force that exists between two objects that are not in motion relative to each other

Answer 24

what is static friction?

Question 25

force that exists between two objects in motion relative to each other

Answer 25

what is kinetic friction?

Question 26

kinetic friction is a _ value whereas static friction depends on magnitude of applied force

Answer 26

constant

Question 27

_ depends on two materials in contact

Answer 27

coefficient of friction

Question 28

coefficient of static friction is always _ than coefficient of kinetic friction

Answer 28

higher

Question 29

measure of the inertia on an object; amount of material

Answer 29

what is mass?

Question 30

force experienced by given mass du to gravitational attraction to Earth

Answer 30

what is weight?

Question 31

(vector) change in velocity over time

Answer 31

what is acceleration?

Question 32

an object will remain at rest or move with constant velocity if there is no net force on object

Answer 32

what is newton's first law of motion?

Question 33

any acceleration is the result of the sum of forces acting on an object and its mass

Answer 33

what is newton's second law of motion?

Question 34

any two objects interacting with one another experience equal and opposite forces as a result

Answer 34

what is newton's third law of motion?

Question 35

velocity and acceleration vectors are parallel or antiparallel

Answer 35

what is linear motion?

Question 36

free fall is a type of _ motion

Answer 36

linear

Question 37

contains x and y component; only acted upon by gravity (if air resistance is negligible)

Answer 37

what is projectile motion?

Question 38

(2D movement) dimensions are parallel and perpendicular to surface of the plane

Answer 38

what are inclined planes?

Question 39

motion with radial and tangential dimensions

Answer 39

what is circular motion?

Question 40

centripetal force points _

Answer 40

radially inwards

Question 41

the only force in uniform circular motion is _

Answer 41

centripetal force

Question 41

instantaneous velocity always points _

Answer 41

tangentially

Question 42

representations of forces acting on an object

Answer 42

what are free body diagrams?

Question 43

occurs in absence of net forces acting on object

Answer 43

what is translational equilibrium?

Question 44

an object in translational equilibrium has constant _

Answer 44

velocity

Question 45

occurs in absence of net torques acting on object

Answer 45

rotational equilibrium

Question 46

an object in rotational equilibrium has constant _

Answer 46

angular velocity

Question 47

property of a system that enables it to do or make something happen

Answer 47

what is energy?

Question 48

the SI unit for all forms of energy

Answer 48

whar are joules (J)?

Question 49

energy associated with movement of objects

Answer 49

what is kinetic energy?

Question 50

kinetic energy depends on ...

Answer 50

mass, speed (squared)

Question 51

energy stored within a system

Answer 51

what is potential energy?

Question 52

_ energy has four forms: 1. gravitational 2. electric 3. elastic 4. chemical

Answer 52

potential

Question 53

relates to mass of an object and its height above datum

Answer 53

what is gravitational energy?

Question 54

zero-point

Answer 54

what is datum?

Question 55

related to spring constant and degree of stretch-compression of a spring squared

Answer 55

what is electronic potential energy?

Question 56

measure of the stiffness of a spring

Answer 56

what is the spring constant?

Question 57

the potential energy between charged particles

Answer 57

what is electrical energy?

Question 58

energy stored in bonds of compounds

Answer 58

what is chemical energy?

Question 59

sum of kinetic and potential energies of a system

Answer 59

what is total mechanical energy?

Question 60

(path independent) forces that do not dissipate mechanical energy of a system

Answer 60

what are conservative forces?

Question 61

if there are only conservative forces acting on an object, total mechanical energy is _

Answer 61

conserved

Question 62

(path dependent) forces that cause dissipation of mechanical energy from a system

Answer 62

what are nonconservative forces?

Question 63

while total energy is conserved, some mechanical energy is _ (thermal or chemical energy)

Answer 63

lost

Question 64

process by which energy is transferred from one system to another

Answer 64

what is work?

Question 65

work may be expressed as the area under _

Answer 65

pressure-volume curve

Question 66

rate at which work is done or energy is transferred

Answer 66

what is power?

Question 67

the SI unit for power

Answer 67

what are watts (W)?

Question 68

when net work is done on/by a system, its kinetic energy will change by the same amount

Answer 68

what is the work-energy theorem?

Question 69

the factor by which a simple machine multiplies the input force to accomplish work

Answer 69

what is mechanical advantage?

Question 70

simple machines provide the benefit of _

Answer 70

mechanical advantage

Question 71

mechanical advantage makes it easier to accomplish work becaise input force needed is _

Answer 71

reduced

Question 72

output force of a simple machine

Answer 72

what is load?

Question 73

input force of a simple machine

Answer 73

what is effort?

Question 74

ratio of machine's work output to input when nonconservative forces are taken into account

Answer 74

what is efficiency?