# Physics Final Semester I

## 49 terms

### base physical quantities

fundamental measurements that have no substitute

### accepted values

non-contested data (the average of thousands of trials)

### absolute error

the difference between the accepted value and a measured value

### relative error

the absolute error divided by the accepted value

### |AV-YV|

how is absolute error found?

### (|AV-YV|) / AV

how is relative error found?

### variable

values we allow to be altered during experimentation

### control

varibles whose values are intentionally kept the same during experimentation

### assumption

variables that we assume remain unchanged during experimentation or have no bearing on the experiment if changed

### constant

a value we believe to never change

### vertical axis

the dependent value is graphed on the...

### horizontal axis

the independent variable is graphed on the...

### independent variable

vairable whose values are chosen BEFORE experimentation

### dependent variable

variable whose values are unknown until trials take place

### (x2-x1)/(t2-t1)

how is AVERAGE VELOCITY found?

### x = (v,avg)t + x,o

how is POSITION found?

### find the slope of a line tangent to the curve

how is INSTANTANEOUS VELOCITY found?

### (v-v,o)/(t-t,o)

how is AVERAGE ACCELERATION found?

### v = v,o + a,o(t)

finish the equation ... v =

### x = x,o + v,o(t) + a,o(t)^2

finish the equation ... x =

### velocity is increasing

acceleration arrows are parallel with the velocity arrows when...

### velocity is decreasing

acceleration arrows are anti-parallel with velocity arrows when...

### numbers + units

all values have...

### vector

quantity that requires direction as a value...

### acceleration, displacement, position, velocity

what are four examples of vectors?

### scalars

quantity that does not account direction as part of the value...

what are two examples of scalars?

### -9.8 (m/s^2)

what is the value of gravitational acceleration?

### conversion factor

factor with a constant value that determines the relationship between two measurements of the same type

### proportionality factor

factor with a constant value that determines the relationship between two measurements of different types

what is mass?

what is weight?

### weight

how hard the Earth pulls at matter gravitationally

### TO us

weight is something that happens...

### weight

humans have mass, but they do not have...

### truth

that which is true is immutable...

### accuracy

how close one measurement is to the real or accepted value

### precision

degree to which two a set of measurements is close to eachother in value (i.e., very little error value)

### always parallel

acceleration and net force arrows are...

### they are the same

what is the relationship between the value of the friction experienced by DISC A travelling at 10 m/s^2 and the friction experienced by DISC B travelling at 20 m/s^2

### Fg = m(-9.8N/kg)

how is GRAVITATIONAL FORCE found?

### a = Fnet/m

how is ACCELERATION found?

### an object in motion stays in motion unless acted upon by another force

What is Newton's First Law of Motion? (define)

### a = Fnet/m

What is Newton's Second Law of Motion? (equation)

### for every action, there is an equal and opposite reaction

What is Newton's Third Law of Motion? (define)

### force applied by a surface at 90deg off the surface

what is Normal Force?

### ratio between the maximum static friction to the normal force

what is the Coefficient of Static Friction?

### force exerted on an object because of contact with a surface

what is kinetic friction?

### ratio of weight on an object to the mass the object has

what is graviational field strength?