# scienceee

### 31 terms by lelaxoxo12

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### formula for speed:velocity:acceleration:momentum:average speed

speed= distance/time. velocity= a speed in a given direction. Acceleration= final velocity- initial velocity/time. Momentum= mass x velocity. average speed= total distance/total time.

### what is the unit for acceleration?

meters/s/2? with a direction.(ex.north)

### what is circular motion?

acceleration that occurs in a circular motion

### reference point:

an object used to compare motion

### what is the rate that all objects fall at?

9.8 meter per second 2 until they reach terminal velocity'

### what is the unit of force?

newtons, 1N= 0.2247 lbs. . 1 lb.= 4.45N

### how do we make an object move?

apply force. force can make an object balanced or unbalanced.

### what does it mean when forces are balanced?

the forces are equal and oppisite.

balance,

### net force:

a sum of all forces. forces in the same direction you add. opposites=subtract.

### wha happens when there is a rough surface>?

greater friction. the greater the force, the more friction you have.

### 4 types of friction

sliding, rolling, static, fluid

### what is the law of universal gravitational force?

part 1: gravitatiol forces increase as mass increase, part2: gravitational forces decrease as distance increases.

### momentum:

all moving objects have_____. the more an obect has the harder it is to stop it,

### motion:

an objects change in position over time compared with a reference point

### speed:

the rate at which an object moves

### velocity:

the speed of an object in a given direction

### acceleration:

the rate at which velocity changes, an object accelerates if its sped changes.direction,or both. the more mass the more acceleration

### force:

a push or pull. all forces have both size and direction

### newton:

the SI unit of force

### gravity:

a force of attraction between objects that is due to there masses

### friction:

a force that opposes motion between 2 surfaces that are touching

### weight:

a measure of gravitational force exerted on an object, the force of gravity pulling you down is the earth

### mass:

the amount of matter that something is made of. a measure of inertia

### what is the 1st rule of physics?

things like to keep on doing what there doing.

laziness

### what does inertia depend on?

it depends on the mass of an object

### what does force varrie with

mass and change of speed

### why do things fall down'?

the force of gravity

### why does friction occur?

because the surface of any object is rough

### name 2 ways in which friction can be increased

a rougher surface and more force

Example: