Chapter 12

Question 0

An object tends to ____.

Answer 0

maintain its state of motion

Question 1

-an object at rest remains at rest and an object in motion maintains its velocity unless it experiences a net force

Answer 1

Newton’s First Law

Question 2

Why is it difficult to start a bowling ball rolling?

Answer 2

You have to overcome a lot of static friction because of the large mass of the object.

Question 3

-the tendency of an object to resist a change in motion unless an outside force acts on the object
Ex. Crash Test Dummy

Answer 3

Inertia

Question 4

-the unbalanced force acting on an object equals the object’s mass times its acceleration

Answer 4

Newton’s Second Law

Question 5

Force is measured in _____.

Answer 5

Newtons (N)

Question 6

1N= ___ lbs.

Answer 6

1N=0.225lbs.

Question 7

1lb=____ N

Answer 7

1lb=4.448N

Question 8

F=

Answer 8

ma

Question 9

Look at the practice problems on page 401.

Answer 9

LOOOOOOOOOOOOOOOOOOOOOOOOOKKKKKKKKKKKKKKKK

thought this said look? haha, lol, no. legend of korra

Question 10

_____ depends on force and mass.

Answer 10

Acceleration

Question 11

a=

Answer 11

net force/mass

Question 12

The acceleration of an object is _____ to the net force on the object and _____ to the object’s mass.

Answer 12

Directly proportional

Inversely proportional

Question 13

1 N=

Answer 13

1kg x 1m/s2

Question 14

-a measure of the gravitational force exerted on an object

Answer 14

Weight

Question 15

g=

Answer 15

free-fall acceleration = 9.8 m/s

Question 16

w=

Answer 16

mg

Question 17

Weight is measured in _.

Answer 17

Newtons

Question 18

Is weight different from mass?

Answer 18

Yes

Question 19

What is mass?

Answer 19

A measure of the amount of matter in an object

Question 20

Weight depends on ______.

Answer 20

gravitational force

Question 21

Large land animals need ___ skeletons to support their mass against the force of gravity.

Answer 21

Large

Ex. Elephant

Question 22

How does this apply to trees?

Answer 22

Their root system is normally as wide as their branches.

Question 23

-states that all objects in the universe attract each other through gravitational force

Answer 23

Law of universal gravitation

Question 24

F=

Answer 24

G (m1m2)/d2

Question 25

-states the gravitational force increases as one or both masses increase and the gravitational force decreases as the distance between the two masses increases

Answer 25

Gravitational Equation

Question 26

All matter is affected by _____.

Answer 26

Gravity

Question 27

The force of gravity is easy to understand if you consider two points: 1) 2)

Answer 27

1) the size of the masses | 2) the distance between them

Question 28

Gravitational forces increases as _____ increases.

Answer 28

Mass increases

Question 29

-the motion of a body when only the force of gravity is acting on the body

Answer 29

Free fall

Question 30

Why is free fall acceleration constant?

Answer 30

Because of the law of universal gravitation

Question 31

Give an example of free fall

Answer 31

Astronauts in orbit

Question 32

What can balance weight?

Answer 32

Air resistance

Question 33

Does a heavier object experience a greater or lesser gravitational force?

Answer 33

Greater

Question 34

A heavier object is ___ to accelerate.

Answer 34

Harder

Question 35

-the constant velocity of a falling object when that force of air resistance is equal to the magnitude and opposite direction to the force of gravity

Answer 35

Terminal velocity

Question 36

the curved path followed by an object that is thrown, launched, or otherwise projected near the surface of the earth

Answer 36

Projectile Motion

Question 37

What are the two components of projectile motion?

Answer 37

Horizontal and vertical

Question 38

When the two motions are combined,

Answer 38

they form a curved path

Question 39

Give an example of projectile motion.

Answer 39

Orbiting

Question 40

-for every action force, there is an equal and opposite reaction force

Answer 40

Newton's Third Law

Question 41

Force always occurs in ____. | Give an example

Answer 41

Pairs | Ex. Sitting in your desk

Question 42

Do forces in a force pair act on the same object?

Answer 42

No

Question 43

Do equal forces always have equal effects?

Answer 43

No

Question 44

-a quantity defined as the product of the mass and velocity of an object

Answer 44

Momentum

Question 45

What are the units for momentum?

Answer 45

kg(m/s) | Ex. Pg. 415

Question 46

p=

Answer 46

mv

Question 47

What increases as mass and velocity increases?

Answer 47

Momentum

Question 48

What is related to momentum?

Answer 48

Force

Question 49

-the total amount of momentum in an isolated system is conserved

Answer 49

Law of Conservation of Momentum

Question 50

Give an example of the Law of Conservation of Momentum.

Answer 50

Rocket Propulsion

Question 51

Momentum is conserved in ____.

Answer 51

collisions

Question 52

Momentum is _____.

Answer 52

transferred