chapter 1 gravity and motion

Question 1

why do objects fall to the ground at the same rate

Answer 1

the acceleration due to gravity

Question 2

what does a acceleration depend on

Answer 2

force and mass

Question 3

does a heavier objects experience a greater gravitational force then lighter object

Answer 3

yes

Question 4

it’s a heavier object harder to accelerate because it has more mass

Answer 4

yes

Question 5

does the extra mass of the heavy object exactly balance the additional gravitational force

Answer 5

yes

Question 6

what is the rate at which velocity changes over time

Answer 6

acceleration

Question 7

what is the objects change in velocity divided by the amount of time during which the change occurred

Answer 7

A acceleration of an object

Question 8

what rate towards the Earth accelerates all objects

Answer 8

9.8 m/s squared

Question 9

what is the force that opposes the motion of objects through the air

Answer 9

Air resistance

Question 10

what does the amount of air resistance acting on the object depend on

Answer 10

size shape and speed of an object

Question 11

as the speed of a falling object increases air resistance_______

Answer 11

increases

Question 12

what is an object that falls at a constant velocity

Answer 12

terminal velocity

Question 13

is terminal velocity a good thing

Answer 13

yes

Question 14

what happens when only gravity is pulling something down and no other forces are acting on it

Answer 14

free fall

Question 15

can freefall occur where there is no air

Answer 15

yes

Question 16

what is the measure of gravitational force

Answer 16

weight

Question 17

what does the size of the force depend on

Answer 17

The masses of an object in the distance between them

Question 18

why do astronauts float

Answer 18

because they’re orbiting

Question 19

in free fall are astronauts in freefall or are they orbiting

Answer 19

both

Question 20

what is the Unbalanced force that causes objects to move in a circular path

Answer 20

centripetal force

Question 21

what is the curved path an object follows when it is thrown or propelled the surface of the earth

Answer 21

projectile motion

Question 22

what happens in projectile motion when two motions are combined

Answer 22

they form a curved path

Question 23

what are the two ways that projectile motion can be thrown

Answer 23

horizontal and vertical motion

Question 24

gravity pool everything on earth downward toward the center of the earth

Answer 24

yes

Question 25

what law says an object at rest remains at rest and an object in motion remains in motion at a constant speed in a straight line unless acted on by an unbalanced force

Answer 25

newtons 1 law

Question 26

what happens to a object in rest

Answer 26

it remains in rest

Question 27

what happens to object in motion

Answer 27

they remain in motion

Question 28

l is it true that an object in motion will stay in motion forever unless it is acted on by an unbalanced force

Answer 28

yes

Question 29

why is observing newtons first law difficult

Answer 29

because of friction

Question 30

what is newtons first law of motion sometimes called

Answer 30

law of inertia

Question 31

what is the tendency of all object to resist any change in motion

Answer 31

inertia

Question 32

what happens in the inertia

Answer 32

an object in the rest will remain at rest until a fourth make it move

Question 33

what is the measure of a Inertia

Answer 33

mass

Question 34

is it true that an object that has a small mass has less Inertia

Answer 34

yes

Question 35

what law says the accleration of an object depends on the mass of the object in the amount of force applied

Answer 35

Second

Question 36

does acceleration depend on mass

Answer 36

yes

Question 37

does acceleration depend on force

Answer 37

yes

Question 38

if you use more force will acceleration increase

Answer 38

yes

Question 39

what is new in second law mathematically

Answer 39

force = mass•accleration

Question 40

what law says whenever one object exerts a force on a second object the second object exerts an equal opposite force on the first

Answer 40

3

Question 41

do all forces act in pairs

Answer 41

yes

Question 42

is a force always exerted by on object on another object

Answer 42

yes

Question 43

how do the forces acting pairs for newtons third law

Answer 43

action and reaction

Question 44

what depends on the objects mass and velocity

Answer 44

momentum

Question 45

if an object has more momentum what is it harder to do

Answer 45

stop the object or change its direction

Question 46

what is the equation of momentum

Answer 46

p=m•v

Question 47

what happens with the momentum when an moving object hits another object

Answer 47

the momentum is transferred

Question 48

what happens when the momentum is transferred

Answer 48

the rest of the momentum stays with the first object

Question 49

what states that anytime objects collide the total amount of momentum stays the same

Answer 49

law of conservation of momentum

Question 50

what happens when objects bounce of each other

Answer 50

the momentum is transferred from one object to another

Question 51

Who argued that the mass of an object does not affect the time the object takes to fall to the ground

Answer 51

Galileo Galilei