# Karen and Daphne

### 20 terms by mrsdira

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Motions and Forces

a push or a pull

### motion

a change of position

### speed

distance travelled per unit time

### velocity

the speed of an object in a particular direction

### acceleration

(physics) a rate of change of velocity

### newton

the SI unit of force

### net force

The overall force on an object when all the individual forces acting on it are added together

### weight

the force of gravity on an object

### mass

a body of matter without definite shape

### gravity

(physics) the force of attraction between all masses in the universe

### terminal velocity

the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity

### free fall

the motion of a falling object when the only force acting on it is gravity.

### projectile motion

the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth

### inertia

(physics) the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force

### pressure

the force applied to a unit area of surface

### fluid

a continuous amorphous substance that tends to flow and to conform to the outline of its container: a liquid or a gas

### pascal

a unit of pressure equal to one newton per square meter

### atmospheric pressure

the pressure caused by the weight of the atmosphere

### buoyant force

upward force exerted on an object immersed in a fluid, the upward force that keeps an object immersed in or floating on a fluid

### archimedes' principle

the buoyant force on an object is equal to the weight of the fluid displaced by the object

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