### 23 terms by bms-science

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### Acceleration

the rate at which velocity changes; an object accelerates if its speed and / or direction changes. Acceleration may be postitive(increasing) or negative (decreasing)

### Centripital Force

the accelration of an object in a circular motion

a push or a pull

### Balanced force

forces acting on an object that cause the net force to be zero

### unbalanced force

forces acting on an object that cause the net orce to be greater than zero

### gravity

the attractive force between two objects proportional to gravity

### inertia

the tendency of all objects to resist any change in motion (start or stop)

### mass

the amount of matter in an object

### milky way galaxy

our solar system is part of this galaxy. It contains single stars , double stars, asteroids, meteors, and gas and dust.It is an elliptical shape.

### motion

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

### newton's laws of motion

1an object in motion will remain in motion or an object at rest will remain at rest unless acted upon by an outside force.
2the accelaration of an object is equal to the mass of that object and the force applied
3 for every action force there is an equal and opposite reaction force.

### newton

the SI unit of force.

### orbit

the path of an object as it revolves around another object

### revolution

the movement of an object around another object

### rotation

the spinning motion of a planet about its axis

### speed

the rate at which an object moves(S=d/t) Speed=distance/time

### straight line motion

motion in a straight line

### satellite

any object that revolves around another object in space.

### tide

the daily rise and fall of earth's waters on shores

### weight

a measure of the gravitational force on an object

### work

the action that results form doing something (W=fxd) Work =force times distance
work is equal to the force applied multiplied by the distance an object is moved

### conservation of momentum

the total momentum of the two objects before the collsion is equal to the total momentum of the two objects after the collsion . That is, the momentum lost by object 1 is equal to the momentum gained by object 2

### friction

sliding, rolling, fluid, static

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