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51 Cards in this Set

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What is the difference between distance and displacement

Distance: how far you travel


Displacement: how far you are from the start

Difference between speed and velocity?

Speed: scalar distance/time


Velocity: gives direction displacement/time

How do you determine the average velocity an object from position data?

All positions/ all times

How do you determine the instantaneous velocity of an object from position data?

Specific point/ specific time

How do you determine the average acceleration of an object from velocity data?

Velocity/time


Vf-vi/time

Give two examples of the velocity of an object when it's acceleration is zero

-not moving


-moving at a constant speed in a straight line

Describe the acceleration of an object moving in a circular path at a constant speed

Acceleration is towards center

Describe and name newtons 1st law

Anything in motion will stay in motion unless acted upon by an outside force

Give two examples of an objects motion the forces acting on the object are balanced

-motionless


-moving at constant speed

Name the most prominent non-contact force discussed in class

Gravity

Describe and name all of the forces acting on a falling raindrop

Gravity and friction

Draw and name all the forces acting on a braking automobile

Gravity down.


Normal up.


Friction pushing back.

Describe and name newtons second law

F=ma

What is the relationship between the net force on an object and the objects acceleration?

Bigger net force= bigger acceleration

Describe the effect an objects mass to its acceleration when an unbalanced force is applied

Mass and acceleration are inversely proportional

Describe and name newtons third law

Every action has an equal opposite reaction

What are the two forces acting between earth and the moon?

Earth pulls moon


Moon pulls earth

If a physics textbook is pushing down on the table with a force of 15N what is the magnitude and direction of the table pushing on the book?

15N up


15N down

Name two real world applications of newtons 3rd law

-car on road road on car


-chair on floor floor on chair

How does the mass of different objects affect their gravitational force? Give an example

Bigger mass=bigger force


Ex. Sun

What is the difference between mass and weight? Give an example.

Mass: how much stuff you have.


Weight: how much gravity pulls on the mass

How does the distance between two objects affect the gravitational force? Give an example.

Closer they have greater forces. Example sun is far away so force in smaller

Give one example of the importance of gravitational forces in the space program

Use it to slingshot Rockets

Name the types of charges and their effect on the electric force

Positive


Negative


Neutral


Opposites attract


Same repel

Describe how the amount of charge affects the electrical force. Give an example

Bigger charge equals more force

How is inference uses explain forces in nature such as gravitational force? Use examples to help explain

We can see and predict but don't know actual cause of it. Example gravit

Describe the relationship between charged particles and the strength of electric force. Give me an example

Closer = more force


Farther = less force

Give examples of that every day application of electric forces found in both nature and technology

Lights


Body


Floor


Car

Name and describe the five different types of potential energy

Gravitational:height and falling


Nuclear :stored in nucleus


Chemical:Carbon bonds


Elastic: stretched or compressed


Electrostatic: extra or lack of electrons

Describe a closed system in terms of its total energy

Energy is conserved

Describe two examples of transformation. Between kinetic and potential energy in a system each Example must use a different type of potential energy

Apple: chemical into kinetic


Skydiving: gravitational into kinetic

Describe the loss of useful energy and energy transformations

It is turned into heat energy which we cannot use

Describe transfer of heat by conduction. Give an example

Touching.


-pan on stove

Describe transfer of heat by convection. Give an example

Molecules move with its heat


-boiling water

Describe transfer of heat by radiation given example

Waves


-microwave

Describe how the transformation of mechanical energy into electrical energy and the transmission of electrical energy is the same in each power plant

The only difference is way of turning turbine

Descibe a specific power plant and it's process to transform types of energy into electrical wnergy

Burning natural gas

Define frequency and period

Frequency: cycles/time


Period: time/cycles

Define and give an example of reflection

Waves change direction at same angle


-looking in a lake

Define and give an example of diffraction

Waves go through an opening


-wave in ocean

Define and give an example of refraction

Changing medium


-going through water

Examples of waves commonly observed in nature or used in technological application

Radios waves


Ocean waves

Identify and describe the relationship between speed wavelength and frequency of a wave

V=wl*f


They change each other

Explain the observed change in frequency of a mechanical waves coming from a moving object as it approaches and moves away

Doppler affect: come towards you-scrunched waves high frequency


Away from you- lower frequency

Explain the transfer of energy through medium mechanical waves

It is based off of amplitude

Describe the relationship of energy to wavelength or frequency for electromagnetic radiation

Energy is based off of frequency

Name and describe the parts of electromagnetic spectrum

Radio waves: long wavelength low frequency


Gamma ray: short wavelength high frequency

What is the speed in which all electromagnetic waves travel

The speed of light


3x10^8

Explain the observed change in frequency of an electromagnetic wave coming from moving object as it approaches and moves away

Increased frequency as it moves towards you. (Blue)


Decreased frequency as it moves away. (Red)

Give two examples of the use of electromagnetic radiation in every day life

TV


Cell phones

Name the three contact forces discussed in class

Normal


Tension


Friction