Basic Physics Concepts

Question 1

define physics

Answer 1

science that deals with matter and energy and their interactions

Question 2

what is matter

Answer 2

occupies space
has mass
interconvertible with energy

Question 3

forms of matter

Answer 3

solid
liquid
gas

Question 4

what is mass

Answer 4

measure of its inertia
amount of material it contains
weight in a gravitational field
constant

Question 5

what is force

Answer 5

a push or pull upon an object resulting from the object’s interaction with another object

Question 6

forces only exist as a result of an

Answer 6

interaction

Question 7

when forces are equal

Answer 7

no motion

Question 8

what is inertia

Answer 8

property of matter by which it retains its state of rest or velocity along a straight line so long as it is not acted on by an external force

Question 9

newton’s first law of motion

Answer 9

a body at rest stays at rest
a body in motion stays in motion
until there is a change in force applied to it

Question 10

newton’s second law of motion

Answer 10

force=mass x acceleration

F=m x a

Question 11

what is acceleration

Answer 11

change in speed or direction of object
change in velocity
when velocity is not constant

Question 12

what is weight

Answer 12

weight is a force
weight = mass x acceleration
gravity is the acceleration

Question 13

difference between mass and weight

Answer 13

mass is constant

weight is a force

Question 14

what is velocity

Answer 14

distance traveled per time, not speed

Question 15

difference between speed and velocity

Answer 15

speed how fast we are going in any direction
velocity- includes direction
speed- measure of magnitude
velocity- vector quantity, has magnitude and direction

Question 16

what is work

Answer 16

application of a force through a distance
work = force x distance
W = f x d

Question 17

newton’s third law of motion

Answer 17

for every action there is an equal and opposite reaction

Question 18

what is energy

Answer 18

energy is the ability to do work

comes in many forms

Question 19

law of conservation of energy

Answer 19

energy cannot be created or destroyed

energy can only be transferred or changed from one form to another

Question 20

potential energy

Answer 20

ability to do work

“stored energy”

Question 21

kinetic energy

Answer 21

energy of motion

Question 22

chemical energy

Answer 22

energy released by a chemical reaction

Question 23

electric energy

Answer 23

energy from an electron moving through an electric potential (across a voltage difference)

Question 24

thermal energy

Answer 24

motion at molecular level

kinetic energy of molecules- faster motion=more thermal energy

Question 25

nuclear energy

Answer 25

energy in nucleus of atom

Question 26

electromagnetic energy

Answer 26

form of energy that is reflected or emitted from objects in the form of simultaneous electrical and magnetic waves that can travel through space

Question 27

go over electromagnetic spectrum

Answer 27

go over electromagnetic spectrum

Question 28

order of energy on electromagnetic spectrum

Answer 28

am radio
short wave radio
television
fm radio
microwaves
radar
millimeter waves
telemetry
infrared
visible light
ultraviolet
xrays
gamma rays

Question 29

can energy change forms

Answer 29

yes

can be converted from one form to another

Question 30

relation of mass and energy

Answer 30

energy and mass are interconvertible