Flashcards in Ch. 12 Pt. 2 Quiz Deck (19):

0

## What is momentum measured in?

### km x m/s

1

## Momentum is calculated by multiplying what?

### mass and velocitoy

2

## According to Newton's third law of motion, what happens whenever one object exerts a force on a second object?

### the second object exerts an equal but opposite force on the first object

3

## The equal and opposite forces described by Newton's third law are called _________ and _________ forces.

###
action

reaction

4

## What factors affect the momentum of a moving object?

###
mass

velocity

5

## If two identical objects are moving at different velocities, the object that is moving faster will have __________ momentum.

### greater

6

## If your shoes are in a box on a shelf, what is the momentum?

### zero

7

## What is the formula for momentum?

### momentum=mass(kg) x velocity(m/s)

8

## In a closed system, objects can exert forces on one another, but other objects and forces cannot ________ or __________ the system.

###
leave

enter

9

## List the differences between strong nuclear forces and weak nuclear forces.

###
Strong- acts on neutrons and protons, acts over a very short distance, and is very strong

Weak- acts on all particles, acts over a short distance, weaker then the strong force

10

## What are the four forces universal forces?

###
electromagnetic

weak nuclear

strong nuclear

gravitational

11

## Name the only two forces that can both attract and repel.

### electric and magnetic

12

## What evidence suggests that nuclear forces have a powerful force of attraction?

### the nucleus of an atom doesn't explode

13

## State Newton's law of universal gravitation.

### every object in the universe attracts every other object in the universe

14

## the gravitational force of attraction between two objects depends on what?

###
mass

distance

15

## The sun's mass is much greater than the mass of Earth, so the sun's gravitational pull is much ________ then that of Earth's.

### stronger

16

## Why does the moon orbit Earth in a nearly circular path?

### the moon's inertia and centripetal force

17

## What is the primary cause of Earth's ocean tides?

### the gravitational pull of the moon

18