Study notes physci 105 less death

Question 1

Acceleration

Answer 1

Change in velocity(accel, decel, direction)

Question 2

speed

Answer 2

measure of how fast something is moving

Question 3

instantaneous speed

Answer 3

speed at a specified instant

Question 4

velocity

Answer 4

both speed and direction

Question 5

force

Answer 5

push or pull

Question 6

net force

Answer 6

sum of all forces

Question 7

weight

Answer 7

downward pull on an object resulting from gravity

Question 8

average speed

Answer 8

distance during a period of time

Question 9

Formula for acceleration

Answer 9

V(bar)=(Vf-Vi)/t

Question 10

four fundamental forces

Answer 10

Gravity, Electromagnetic forces, Weak nuclear strong nuclear

Question 11

accel of Gravity (g)

Answer 11

32 ft/s^2 or (9.8 m/s^2)

Question 12

newtons 1st law of motion

Answer 12

(inertia) an object in motion tends to stay in motion inversely an object at rest tends to stay at rest

Question 13

newtons 2nd law of motion

Answer 13

the acceleration of an object is directly proportional to the net force acting on it and inversly proportional to the mass of the object

Question 14

newton defined in terms of what unit

Answer 14

mass: measured in kg, and acceleration: measured in m/s^2

Question 15

mass is directly proportional to what?

Answer 15

inertia

Question 16

formula for force

Answer 16

F=ma

Question 17

what are the units of force (weight)

Answer 17

lb and newton

Question 18

what are units of mass

Answer 18

kg

Question 19

newtons 3rd law of motion

Answer 19

whenever 2 objects interact the force exerted on one object is equal in size and oposite in directiokn to the force exerted on the other object

Question 20

formula for momentum

Answer 20

p=mv (momentum=mass*velocity)

Question 21

universal law of gravitation

Answer 21

every object in the universe in attracted to every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distances between them (F=G((m1m2)/d^2)))

Question 22

momentum

Answer 22

product of an objects mass and velocity

Question 23

law of conservation of momentum

Answer 23

momentum always remains the same

Question 24

impulse

Answer 24

change of momentum equal to a force times the time of application (delta)p= ft

Question 25

centripetal force

Answer 25

force that pulls an object out of its stright line path

Question 26

formula for period

Answer 26

T= 1/f

Question 27

formula for speed

Answer 27

v(bar)= d/t

Question 28

formula for average velosity

Answer 28

a=(Vf-Vi)/t

Question 29

formula for velocity

Answer 29

(lambda)f —–wavelength* frequency

Question 30

amplitude

Answer 30

max value of dispacement of a vibration

Question 31

frequency

Answer 31

max number of vibrations in a second

Question 32

hertz

Answer 32

the unit of frequency

Question 33

waves

Answer 33

traveling vibrations or disturbances in a medium

Question 34

transverse waves

Answer 34

particles move perpendicular to movement of wave

Question 35

longitudinal wave

Answer 35

particles move parellel to movement of wave

Question 36

sound (what kind of wave?)

Answer 36

longitudinal wave

Question 37

disturbances of a wave are called?

Answer 37

condensations (crests) and rarefactions (troughs)

Question 38

audible sounds

Answer 38

between 20-20000 Hz