# 7th grade physics unit study guide

### 57 terms by Hayhay1313

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

distance/time

distance/time2

100,000

### It can be important to know about the velocity of an object , not just its speed, because

velocity also tells direction

opposite

inertia

unbalanced force

mass

### Newtons second law of motion states the relationship of mass ,acceleration,and force. it says that

force equals acceleration divided by mass

centripetal

kj x m/s

accelerates

that is stored

### Kinetic energy depends on

mass and velocity

### The suns energy comes from

electromagnetic energy

### Sunlight is a form of

electromagnetic energy

thermal energy

### The formula wieght x height is used to calculate

elastic potential energy

nuclear energy

speed

slope

acceleration

velocity

meter

reference point

### The speed of an object at one instant of time

instantanious speed

### A system of measurement based on multiples of ten and on established measures of mass,length, and time

Internation system of units

average speed

### friction

The force that one surface exerts on another when two surfaces rub against eachother

gravity

force

air resistance

### The greatest velocity a falling object can acheive.

terminal velocity

static friction

### Forces that produce a nonzero net force , which changes an object's motion .

unbalanced forces

Newton

### The rule that in the absence of outside forces the total momentum of objects that interact does not change.

Law of conversation

projectile

net force

fluid friction

mass

sliding friction

momentum

weight

balanced forces

energy

chemical energy

### The energy of stretched or compressed objects

elastic potential energy

thermal energy

kinetic energy

### The energy of electric charges

electrical energy

### The energy of electric charges

electrical energy

### The energy of light and other forms of radiation

electromagnetic energy

nucleur energy

### Kinetic or potential energy asssociated with the motion or position of an object.

mechanical energy

### potential energy that depends on the height of an object

gravitational potential energy

potential energy

Example: