Momchilovich Unit 3 Forces

Question 1

A pull, push, or lift on a mass

Answer 1

Force

Question 2

A change in velocity over time

Answer 2

Acceleration

Question 3

Objects in motion will stay in motion or at rest until acted upon by an unbalanced force

Answer 3

Newton’s 1st Law of Motion

Question 4

A pulling force that pulls all objects to the center of the Earth

Answer 4

Gravity

Question 5

Force = mass x acceleration, F = m x a

Answer 5

Newton’s 2nd Law of Motion

Question 6

For every action, there is an equal and opposite reaction

Answer 6

Newton’s 3rd Law of Motion

Question 7

Variable that is being observed or that you are measuring

Answer 7

Dependent variable

Question 8

Gravity and friction are types of what?

Answer 8

Forces

Question 9

How do some say Galileo studied the effects of gravity?

Answer 9

He threw cannonballs off the Leaning Tower of Pisa

Question 10

A pushing force that occurs when masses are in contact with each other

Answer 10

Friction

Question 11

Variable that you change or manipulate; stands ALONE

Answer 11

Independent variable

Question 12

What keeps the planets in orbit around the sun?

Answer 12

Gravity

Question 13

The tendency of an object at rest or in motion to stay at rest or in motion

Answer 13

Inertia

Question 14

What is force measured in?

Answer 14

Newtons

Question 15

An object at rest…..

Answer 15

Has balanced forces acting on it

Question 16

When should you use a bar graph?

Answer 16

When you are comparing 2 or more test groups

Question 17

When should you use a line graph?

Answer 17

When you are showing how a variable changes

Question 18

When should you use a pie chart?

Answer 18

When you are displaying survey results or percentages

Question 19

What is acceleration measured in?

Answer 19

Meters per second squared

Question 20

True or false.

An object at rest is not accelerating.

Answer 20

True

Question 21

Is your weight the same no matter where you are?

Answer 21

No

Question 22

What is air resistance a form of?

Answer 22

Friction

Question 23

True or false.

Friction between your feet and the ground is necessary for walking.

Answer 23

True

Question 24

What is the constant acceleration due to gravity?

Answer 24

g = 9.8 meters per second squared

Question 25

What 2 unbalanced forces would cause a rocket to fall to the Earth?

Answer 25

Gravity and friction

Question 26

Newton’s 3rd law of motion is sometimes called what?

Answer 26

The Action-Reaction Law

Question 27

What happens to your weight on the moon?

Answer 27

It decreases.

Question 28

What does the independent variable come after in a hypothesis?

Answer 28

The word if

Question 29

What does the dependent variable come after in a hypothesis?

Answer 29

The word then

Question 30

What would happen if you threw a rock in space?

Answer 30

It would stay in motion for a long time and would not stop unless an unbalanced force acted on it.

Question 31

If you add more force to an object, what happens to its acceleration?

Answer 31

It increases.

Question 32

Which of Newton’s laws would explain why the rock in outer space stays in motion?

Answer 32

1st

Question 33

What happens if there are 2 balanced forces acting on the object?

Answer 33

The object does not move(accelerate).

Question 34

A force can change an object’s ______ or _______.

Answer 34

Speed, direction

Question 35

True or false.

As things fall in the air their speed usually speeds up due to gravity.

Answer 35

False

Question 36

A type of friction that opposes a plane flying in the air

Answer 36

Drag

Question 37

An upward force of water pushing on an object

Answer 37

Upthrust

Question 38

Which of Newton’s laws best explains why car passengers should wear a seat belt?

Answer 38

1st