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Action A force exerted by 1 object on a 2nd object.
Friction The force that opposes motion.
Gravity The force of attraction between objects.
Net force The overall force acting on an object.
Normal The force that comes from the surface on which an object is located
Reaction The = but opposite force exerted by the 2nd object back on the 1st object in response to an action force
Balanced Forces opposite in direction & have = magnitude.
Balanced EXAMPLE: Example: When our car wasn’t moving it produced a net force of 0 due to friction and a force that were balanced.
Unbalanced Forces that don’t produce a net force of 0.
Unbalanced EXAMPLE: Example: When our car was just leaving the baseline, the magnitude of the car (weight) was to powerful to have friction to slow it down. The magnitude may also change the direction of the car causing it to veer.
Independent (manipulated) The variables whose value is changed on purpose to observe its effects on another variable.
Independent (manipulated) EXAMPLE: Example: We changed the propeller of our car.
Dependent (responding) The variables whose values may change when the value of the independent variable is changed.
Dependent (responding) EXAMPLE: Example: When we changed the propeller of our car the distance of the car went farther and also the speed.
Controlled: The variable whose values are kept the same in each experiment.
Controlled EXAMPLE: Example: We didn’t change the size and/or shape of the chassis
1st law An object at rest will stay at rest and an object in motion will stay in motion and at a constant speeding the same direction unless acted upon by an outside force.
2nd law The acceleration of an object depends on the magnitude of the net force acting on it and the mass of the object.
3rd law For every force exerted on an object a force that’s = in magnitude & opposite in direction is also exerted on the object.
Meaning of Newton’s 2nd law (f = m x a) Force = mass x acceleration (f=m x a)
Acceleration A change over time in the speed or direction or the speed and direction of motion.
Positive Acceleration An increase of speed (speeding up)
Negative Acceleration A decrease of speed (slowing down)
Calculation of Acceleration Acceleration = force over mass
Weight The force with which an object is attracted toward Earth
Mass The amount of matter in an object.
Criteria Goals that must be met to achieve a challenge.
Constraints Factors that limit how you can solve a problem.
Speed A measure of how fast an object is traveling
Veer A change in direction or course OR TO change the direction or course.
Baseline A specific value or values that can serve as a basis for comparison.
Centerline The line that determines the veer of the coaster car.
Reference point An object or location with which the position of a 2nd object is compared over time to determine if the 2nd object is moving.
Iteration A repetition that attempts to improve on a process or product.
System A set of parts so related or interconnected that they work as a whole.
Direct relationship A relationship between 2 variables that increase or decrease together.
Inverse relationship A relationship between 2 variables in which 1 variable increases as the other decreases
Inertia The tendency of an object 2 resist any change in its motion.
Quantitative Info based on measurements or counting.
Qualitative Info describing the qualities of objects observed, but not measured.
Metric Units Centimeters, meters and kilometers.
English Units Inches, feet, yards and miles.
Velocity An objects speed and direction.
Components of a well designed experiment Ideas, Criteria, Constraints, Materials, Communication Planning, Multiple trials, Testing, Records, Revisions.
Parts of a coaster car Bearings, Axels, Wheels, metal L-hook, Motor (rubber band), propeller assembly, fin.
Things to consider when building your coaster car Testing the best wheels/ axels that can be more durable and fast. How many spins you do to the rubber band. Criteria & constraints. How much of a load your car can handle. Size of the propeller.
According to Newtons 2nd law of motion, for a given force, acceleration & mass have this what type of relationship? Inverse Relationship.
A runner at the end of a race is getting tired & slowing down. Make a statement about the runners acceleration. The runner is negatively accelerating (NEGATIVE ACCELERATION).
Calculation for speed SPEED = Distance / time (divided by time).
A runner starts from rest & accelerates uniformly to a speed of 16.0 mph in 8.0 sec. What is the magnitude of the runners accelaration? 2 meters per second squared, or 2mph squared.
According to Newtons 2nd law, what would happen to an object's acceleration if you doubled both the netforce & mass? The acceleration would stay the same.
As the mass of an object increaces, what happens to it's accelaration? The acceleration decreases.
Created by: Alex Jackson