Definitions


Here are some definitions of the words we used throughout this unit.

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Mass- Mass is the measurement of how much matter or stuff is in an object. 

Gravity- Gravity is the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface.

Friction- The rubbing of one object or surface against another.

Acceleration- Acceleration is the increase of speed.

Force- a force is a push or a pull.

Weight- weight is a measurement of the gravitational force is acting on a object.

Newtons first law of motion- An object that is moving in a straight line will still go in a straight line unless acted upon by an unbalanced force.

Newtons second law of motion- if mass increases the acceleration has to decrease(Inertia).

Newtons third law of motion- If one object exerts force on a second object, the second object exerts an equal in magnitude and opposite in the direction on the object body.

 Adhesion- It is when one substance is attracted to another substance and they are opposite.

Cohesion- It is when one substance is attracted to another substance and they are the same.

Momentum- Momentum is a word that scientists gave to combine mass and speed

Tension- tension is when two forces are pulling against eachother

Compression- Compression is the opposite of tension. It is when two forces push into something

Gravitational Pull- it is how much force gravity is ction on you. Also called your weight.