Newtons Laws of Motion

Question 1

What is the first part of Newtons First Law of Motion?

Answer 1

An object at rest will remain at rest until an unbalanced (net) force acts upon it

Question 2

What is the 2nd part of Newton’s first law of motion?

Answer 2

An object in motion will remain in motion at a constant speed, in a straight line until and unbalanced (net) force acts upon it

Question 3

What does Newtons 1rst law also go by?

Answer 3

The Law of INERTIA

Question 4

Define INERTIA

Answer 4

the tendency of an object to resist a change in it’s motion. The amount of inertia an object has depends on its mass

Question 5

What will a unbalanced (net) force cause?

Answer 5

An unbalanced (net) force will cause some type of acceleration

Question 6

STUDY TYPES OF FRICTION PICTURE

Question 7

Which types of friction work against motion?

Answer 7

ALL TYPES OF FRICTION WORK AGAISNT MOTION!

Question 8

What is Newtons 2nd law of motion?

Answer 8

An object acted upon by a net force will accelerate in the direction of that force

Question 9

Explanation of 2nd law

Answer 9

Newton’s 2nd law of motion connects FORCE, MASS, and ACCELERATION!

Question 10

STUDY NEWTONS SECOND LAW PICTURE EXAMPLE!

Question 11

How could you accelerate faster on your bike?

Answer 11

1. Decrease mass
2. Pedal w a greater force

Question 12

What is Newton’s 3rd law?

Answer 12

for every action force, there is a equal but opposite reaction force

Question 13

T, Or F, forces act in pairs

Answer 13

TRUE!

Question 14

Why did the ballon 1. _______? Since the ballon accelerates, the must be a _________ acting on it

Answer 14

1. Accelerate
2. unbalanced net force

Question 15

Ballon example action and reaction

Answer 15

Action Force- the elastic force of the ballon pushes air out backward

Reaction Force- the air being pushed out also pushes on the ballon in the opposite direction with an equal force. The ballon accelerates

Question 16

CHECK EXAMPLES IN NOTES

Question 17

Gravity

Answer 17

*The attractive force that exists between any 2 objects that have mass

Question 18

What 2 factors depend on the strength of gravity?

Answer 18

1. Mass of objects (directly proportional)
2. The distance between them (inversely proportional)

Question 19

GRAVITY EXAMPLE (W SUN)

Question 20

Gravity causes objects to ________ toward each other

Answer 20

ACCELERATE

Question 21

On earth gravity causes falling objects to accelerate at _______ towards earths surface

Answer 21

9.8 m/s SQUARED

Question 22

What is the acceleration of gravity on the moon?

Answer 22

1.6 m/s SQUARED

Question 23

An objects _____ will differ depending on the force of gravity. Its _____ will remain constant.

Answer 23

WEIGHT, MASS

Question 24

Air resistance:

Answer 24

a type of friction where gas particles in the atmosphere collide with moving objects. This FORCE causes the object to slow down. Air resistance causes NEGATIVE acceleration. As the speed of a moving object increases, air particles collide with greater FORCE and resistance increases.

Question 25

Air resistance is AKA as…..

Answer 25

DRAG!

Question 26

POSSIBLE OPEN ENDED ****
Satellites need the perfect combination of ______ & ______ in order to make their curved orbit perfectly match the curve of earth.

Answer 26

1. Speed/velocity
2. Height

Question 27

Do satellites fall to earth?

Answer 27

THEY DO!

Question 28

*Satellites are placed in space ____ where they DO NOT encounter ______ to slow them down.

Answer 28

1. high enough
2. AIR RESISTANCE

Question 29

*They are moving ________ horizontally, that their curved path downward, matched the curve of the earth’s surface and never touch the ground.

Answer 29

SO FAST

Question 30

Define weight

Answer 30

The measure of the force of gravity pulling on an object

Question 31

Define mass

Answer 31

The amount of matter in an object

Question 32

What is weight measured in?

Answer 32

NEWTONS

Question 33

What is mass measured in?

Answer 33

GRAMS

Question 34

Will weight remain constant or can it change?

Answer 34

weight will change depending on the force of gravity

Question 35

Will mass remain constant or can it change?

Answer 35

Will remain constant

Question 36

Example proving weight can change depending on the force of gravity

Answer 36

You will weigh LESS on the moon b/c the moon has less gravity

Question 37

Example proving mass can not change

Answer 37

Your mass would be the same on the moon.

Question 38

Static friction

Answer 38

prevents a stationary object from moving

Question 39

sliding friction

Answer 39

occurs when objects slide over one another

Question 40

allows rolling objects to roll

Answer 40

rolling friction

Question 41

***For all problems,
- acceleration units must be m/s SQUARED
- Force units must be NEWTONS (N)
- Mass units must be kg
T OR F

Answer 41

True