Physics Final

life sciences

group of sciences that include biology, zoology, botany, and marine biology

data

information that is taken from tools, equipment, or instruments during an experiment

physics

the study of the nature of things such as motion, forces, energy, matter, heat, sound

the scientific method

process that all sciences use to understand and explain problems, observations, and possible explanations of these

1\. Observations/identify a problem, 2. make an educated guess or hypothesis, 3. Test hypothesis or perform an experiment, 4. Analyze data and observations, 5. make conclusions and discuss the hypothesis/accept reject or modify your hypothesis based on the results of your experiment and data

subjective observations

observations or statements based on feelings, beliefs, or personal opinions

calculated results

results or values determined by solving equations or formulas

hypothesis

educated guess that must be tested by experimentation to prove if it works or not

law

hypothesis that has been tested over and over by many scientists and proven to be true

mechanical equilibrium

includes both static and dynamic equilibrium

vector

has both magnitude and directions

net force

combination of all forces acting on an object

scalar

only measures magnitude

equilibrium rule

name for the equation net force=0

Kg

the unit for measuring mass

weight

depends on acceleration due to gravity and changes with location

gravity

proportional to mass of an object no matter what location

Sir Isaac Newton

used Galileo’s work on objects in motion to create the Law of Inertia

N

the unit used for measuring weight or force

displacement

measure of how far something is from its starting point

instantaneous speed

shown on the speedometer in the car

the apex

the acceleration of an object at the apex is about -10 m/s

the velocity is about 0 m/s

resultant

the solution when 2 vectors are added together

Free body diagram

a diagram in which all of the forces acting on an object are shown