25 terms

# Science 7, Physics Test

###### PLAY
Acceleration
The rate at which velocity changes- FInal Velocity-Initial Velocity/ CHange in Time
Acceleration due to Gravity
If gravity is the only force acting on an object, then we find the object will accelerate at a rate of 9.8m/s2 down toward the center of the Earth (this is often rounded to 10m/s2).
Acetic Acid
Vinegar, when mixed with Sodium Bicarbanate it creates C02, water, Sodium Acetate
Actual Mechanical Advantage shows how much the machine magnifies an input force taking into consideration the friction in the machine- Divide Force Output by Force Input
Archimedes
Many war machines used in the defense of Syracuse, compound pulley systems, planetarium, water screw (possibly), water organ (possibly), burning mirrors (very unlikely).
Dependent Variable
the outcome factor; the variable that may change in response to manipulations of the independent variable
Energy
Energy is the capacity of a physical system to perform work
Final Velocity
Velocity at Impact- (2) Average Velocity
Force
The capacity to do work or cause physical change F=MA, Force= Mass (Acceleration)
Friction
effort expended in rubbing one object against another
Independent Variable
the experimental factor that is manipulated; the variable whose effect is being studied
Isaac Newton
Created the Three Laws of Motion
Joules
The amount of work, in units
Mass
The weight of the object
Mechanical Efficiency
The mechanical efficiency of a machine describes how well the machine converts work input into work output- Work Output/ Work Input(100), higher the percentage the better
Momentum
The quantity of motion in an object- Mass (final velocity)
Newtons
The unit of force required to accelerate a mass of one kilogram one meter per second per second
Physics
The study of matter and energy and the interaction of the two
Projectile
Any object propelled through space by the exertion of a force which ceases after launch.
Reaction Time
The interval of time between application of a stimulus and detection of a response.
Sodium Bicarbonate
Baking Soda, when mixed with Acid Acetic it creates C02, water, Sodium Acetate
Trajectory
The path a moving object takes through space.
Velocity
The rate of speed
Water
H20
Work
The transfer of energy