Review

Question 1

What is Newton’s second law

Answer 1

F=ma

Question 2

What is Newton’s third law?

Answer 2

When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction

Question 3

What is the relationship between mass and the force of gravity

Answer 3

Direct relationship

The larger the mass, the more gravitational force will be acted upon it.

Question 4

What is the relationship between distance and force of gravity

Answer 4

The farther away an object is, the less gravitational force will be acted upon it

Question 5

T/F

Action/Reaction forces always cancel each other out

Answer 5

F

Question 6

T/F

Forces can be simultaneous without being casual

Answer 6

T

Question 7

T/F

The force of an object is inversely related to its mass

Answer 7

F

Question 8

T/F

A linebacker bulldozing a quarterback is an example of Newton’s 1st law

Answer 8

T and F

Question 9

What is a force

Answer 9

A push or a pull

Question 10

What happens when 2 or more forces act in an object at the same time

Answer 10

The forces combine to form a net force

Question 11

What is friction

Answer 11

The force that opposed the sliding motion of two surfaces that are touching each other

Question 12

What 2 factors does the amount of friction between two surfaces depend on

Answer 12

The kinds of surfaces

The force pressing the surfaces together

Question 13

What is the source of friction

Answer 13

Micro welds forming and breaking

Question 14

What does static friction prevent

Answer 14

It prevents two surfaces from sliding past each other

Question 15

What does sliding friction do

Answer 15

It opposes the motion of two surfaces sliding past each other

Question 16

What is rolling friction

Answer 16

Static friction that acts over the area where wheels and surface touch preventing the wheel from slipping

Aka traction

Question 17

What are the four basic forces

Answer 17

Gravity
Electromagnetic force
Strong nuclear force
Weak nuclear force

Question 18

What is weight

Answer 18

The gravitational force exerted on an object

Question 19

What is the equation for weight

Answer 19

w=mg

Question 20

What is the difference between mass and weight

Answer 20

Weight is a force and mass is a measure of the amount of matter an object contains

Question 21

What is free fall

Answer 21

When all forces except gravity acting on a falling object can be ignored

Question 22

What is the acceleration of a falling object

Answer 22

9.8m/s2

Question 23

What opposes objects falling toward earth

Answer 23

Air resistance

Question 24

What does the size of the air resistance force depend on

Answer 24

It depends on the size and shape of an object

Question 25

The amount of air resistance depends on what

Answer 25

The size speed and shape of an object

Question 26

When does terminal velocity happen

Answer 26

When the acceleration of the falling object is zero and the net force is zero

Question 27

What is terminal velocity

Answer 27

The highest speed an object will fall

Question 28

What does the terminal velocity depend on

Answer 28

The size shape and mass of a falling object

Question 29

What is centripetal force

Answer 29

The net force exerted toward the center of a curved path

Question 30

The momentum of an object doesn’t change unless

Answer 30

Unless it’s mass velocity or both change

Question 31

What does the Law of Conservation of Momentum state

Answer 31

If a group of objects exerts a force only on each other, their total momentum doesn’t change

Question 32

What is Newton’s first law?

Answer 32

An object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force