How close a group of measurements are to each other
How close a measurement is to the true or accepted value
When you esitmate one place value past the smallest division on the ruler
all measurements have these
all measurements have this (except MA)
the system of units that ALL scientists use internationally
when the distance from another object is changing
a stationary object used to determine if an object is moving
the base SI unit for distance
is a rate, something calculated per unit of time.
the total distance travelled in a set amount of time
the speed at a given moment
speed in a given direction
rise over run on a graph
the rate at which velocity changes
a push or pull in a given direction
a unit of force or weight
the total force on a given object
acts on an object resulting in a net force greater than zero, and this will cause it to move in the direction of the greater force
a force that opposes motion
a force of friction between two surface that are not moving
a force of friction between two solid surfaces sliding past each other
a force of friction when an object rolls across another object
a force of friction when a solid object moves though a fluid (gas or liquid)
a force that pulls all objects in the universe together
how much matter is in an object
the force of gravity pulling an down on an object on the surface of a planet
when gravity is the only force acting on an object, it will accelerate as it falls
fluid friction due to an object falling through the air
When the force of air resistance is equal to the force of gravity then the object will stop accelerating, and remain at the same speed
the resistance of an object to move
Newton's First Law of Motion
An object in motion will stay in motion, and an object at rest will stay at rest, until an unbalanced force acts on it
Newton's Second Law of Motion
acceleration depends on the object's mass and on the net force acting on the object.
Newton's Third Law of Motion
if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.
Momentum can be determined by
multiplying the object's mass and velocity
Law of Conservation of Momentum
The amount of momentum objects have is conserved when they collide. Momentum may be transferred from one object to another, but none is lost.
Work is done on an object when the object moves in the same direction in which the force is exerted.
one Joule is equal to
exerting a force of 1 N over a distance of 1 m.
Power is the amount of work done on an object in a unit of time.
it is a device that can make your work easier, not less.
the force you exert on a machine
the force the machine exerts on the load. (This is equal to the weight of the load).
the work you put into a machine
the work the machine does moving the load
the number of times a machine increases a force exerted on it.
a comparison of the output work to the input work
a machine where the machine lifts the load as you push horizontally
two inclined planes back to back that are used to slice into objects
an inclined plane wrapped around a cylinder
a rod that pivots on a fulcrum
a fixed point where a lever pivots
wheel and axle
A simple machine that consists of two attached circular or cylindrical objects that rotate about a common axis, each one with a different radius.
A simple machine that consists of a grooved wheel with a rope or cable wrapped around it.
A device that combines two or more simple machines.
The question that you are trying to answer in a project
A possible explanation for a set of observations or answer to a scientific question; must be testable.
the hypothesis where you predict there will not be a relationship between the independent and dependent variables
the hypothesis where you predict there will be a relationship between the independent and dependent variables
a list of all of the items used in your project
a detailed list of the steps you followed; detailed enough that someone else could use them to do your exact project
a visual representation of your data
an area where you record your data in an organized fashion
graph and data table
background information to help you understand your topic more clearly
based on your data, the relationship between the independent and dependent variables
a short summary of your entire project
list of sources that provided you with information
thanking anyone who helped you