everything

Question 1

what is inertia?

Answer 1

the tendency of an object to oppose any change in its original state

Question 2

what is newton’s first law of motion?

Answer 2

An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a external net force

Question 3

mass?

Answer 3

it’s the total amount of matter, or “stuff,” in an object while weight is the force of gravity on an object

Question 4

what is inertia of rest?

Answer 4

when no direct force is applied on an object

Question 5

what is inertia of motion?

Answer 5

the tendency of an object in motion to stay in motion in a straight line at a constant speed unless acted upon by an unbalanced force

Question 6

when does friction occur?

Answer 6

when irregular surfaces interlock

Question 7

opposing forces that stop an object are…

Answer 7

frictional forces

Question 8

smoother surfaces have…

Answer 8

less frictional force

Question 9

friction also depends on…

Answer 9

how hard the surfaces of two objects are pushed against each other

Question 10

higher the pressure…

Answer 10

the higher the frictional force

Question 11

mass is:

Answer 11

a physical body’s resistance to acceleration when a net force is applied

Question 12

acceleration =

Answer 12

how quickly a physical body changes its motion

Question 13

physical body =

Answer 13

collection of mass

Question 14

net force =

Answer 14

the force that is affecting the collection of mas/physical body

Question 15

weight:

Answer 15

the force exerted on a body of gravity

Question 16

1 pound is…

Answer 16

2.2 kg

Question 17

Fnet =

Answer 17

net force

Question 18

Fg =

Answer 18

force gravity

Question 19

Fn =

Answer 19

force normal

Question 20

Ft =

Answer 20

force thrust

Question 21

downwash is…

Answer 21

the change in direction of air deflected by the aerodynamic action of an airfoil, wing, or helicopter rotor blade in motion

Question 22

which is greater: thrust or drag

Answer 22

thrust

Question 23

like poles will repel and opposites will…

Answer 23

attract

Question 24

do magnetic field lines cross?

Answer 24

no

Question 25

a compass always points in the direction fo the magnetic field it is close too, this is why...

Answer 25

compasses point north

Question 26

permanent magnets are...

Answer 26

always magnetic, like an actual magnet

Question 27

induced magnet...

Answer 27

acts normal, but if it goes inside another magnet's field it becomes magnetic

Question 28

what is static electricity

Answer 28

still electricity/doesn't move

Question 29

where is the south side of the magnet that is inside earth?

Answer 29

north pole, and visa versa

Question 30

what are three magnetic materials on the periodic table?

Answer 30

iron, nickel and cobalt

Question 31

how do you make steel?

Answer 31

you combine carbon and iron

Question 32

what is gravity?

Answer 32

the force that brings you back to the ground

Question 33

who first came up with the concept of gravity?

Answer 33

isaac newton in his book Principia (~1680)

Question 34

IF YOU DOUBLE THE MASS...

Answer 34

YOU DOUBLE THE FORCE OF GRAVITY!

Question 35

if you are closer to something...

Answer 35

you are closer to its gravitational field

Question 36

what keeps celestial objects in orbit?

Answer 36

gravitational force

Question 37

what is an example of opposing gravity?

Answer 37

holding something in your hand

Question 38

when we freefall, we are...

Answer 38

weightless, but gravity is still acting on us

Question 39

what is the theory of general relativity?

Answer 39

the mass of objects cause a disturbance in space time, which is felt as gravity

Question 40

weight is...

Answer 40

mass x gravity, therefore gravity is mass divided by weight

Question 41

grams and kg are units of...

Answer 41

mass

Question 42

to measure weight you can use a...

Answer 42

spring balance or force meter

Question 43

what is the gravitational force on earth?

Answer 43

9.83 meters per second squared

Question 44

on the moon, gravity is 1.6 m/s² which is about a quarter the size it is on earth...

Answer 44

...and coincidentally, the moon is roughly a quarter of the size of earth!

Question 45

the strength of a gravitational force depends on the...

Answer 45

mass of the object/celestial object/celestial being/size

Question 46

is gravity a contact or non-contact force?

Answer 46

non-contact

Question 47

is magnetic energy contact or non-contact force?

Answer 47

non-contact

Question 48

is friction contact or non-contact

Answer 48

contact

Question 49

when the size and direction of the forces acting on an object are exactly balanced...

Answer 49

...there is no net force, this is called an EQUILBRIUM

Question 50

are you going to fail your science test?

Answer 50

idk just study man