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  • how does rotation differ from revolution

    rotation is the turning on an internal axis while revolution is turning on an external axis.

    what is the direction of Earth's inertia as it travels around the Sun


    what is the direction of the gravitational forces between Earth and the Sun


    provide a natural example of rotation

    Earth Day (24hours)

    provide a man-made example of rotation

    throwing a football (the spiral)

    provide a natural example of revolution

    Earth Year (365.25days)

    provide a man-made example of revolution


    what is pie nine places past decimal


    what is a radian

    a radian is an angle measure equal to a radius around a circle

    how many degrees are in a circle


    how many radians are in a circle


    how many degrees are in a radian


    what is the greek letter used to represent degrees or radians


    what is the greek letter used to represent angular velocity


    what equations can be us to caluclate angular velocity

    omega= theta/seconds or rad/seconds


    .105 rad/s



    what are all motion calculations relative to

    the Earth

    what is an accelerometer

    a device that measures acceleration

    T or F
    we only see one side of the moon



    time taken for Moon to orbit Earth (29.5days)

    what day are we closest to the sun

    January 3

    what day are we furthest from the sun

    July 3

    how would relative simulated gravity of a rotating space station change if
    a)it had twice the radius
    b)it had twice the angular velocity
    C)it had twice the radius and twice the angular velocity


    compare and contrast centripetal force and centrifugal effect and supply examples of each

    centrifugal effect is a center fleeing tendency of an object to fly away from center, centripetal is the opposite. It is a center seeking force. example of centrifugal effect is in a car when tangential inertia and a centripetal force are acting upon an object it creates the centrifugal effect in which if you turn left the passenger will scoot towards the door. An example of centripetal force is when you spin a can on a string that enforces it to stay in circular motion.

    why are radians used in circular motion calculations

    because 6.28 radians = 360 degrees = number of degrees in a circle.

    which has the greater linear velocity, a horse near the outside of a carousel or one near the inside

    the outside horse

    which has a great angular velocity, a horse near the outside of a carousel or the one near the inside

    the have the same

    which of the following is a unit of angular velocity
    a) degrees/second
    b) rad/second
    c) rpm
    d) all of these
    e) none of these

    all of these

    what is the direction of a centripetal force


    what is the direction of a can's inertia that is whirled in a circle by a string


    what is the direction of a centrifugal effect


    what type(s) of circular motion does a carousel horse 2m from the axis experience

    rotation and revolution

    what type of circular motion does a person stand on Earth's north pole experience


    how are the wheels of a railroad car designed in order for them to turn at different speeds

    > diameter in

    what is true about our Moon's circular motion
    a) rotation>revolution
    b) rotation<revolution
    c) rotation=revolution


    what proportionality exists between angular velocity x radius and linear velocity


    which end of a tapered cup rolls faster when it completes a circle

    the wide rim

    which record has the greatest angular velocity
    a) 16rpm
    b) 33.3 rpm
    c) 45rpm
    d) 78rpm


    earth rotates and revolves through space. earth rotates about the ______, which is an _______ axis. Earth revolves about the ______, which is an ________ axis.

    north/south pole, internal, Sun, external

    which type of circular motion for the earth is known as a revolution


    which of these statements is true
    a) 360degrees=6.28radians
    b) 1rpm=.105rad/s
    c) 1radian=57.3degrees
    d) all of these

    d)all of these

    what causes the centrifugal effect

    centripetal force and tangential inertia

    what supplies the centripetal force when a car turns in a circle

    road pushes tire

    which carousel horse has greater centripetal force
    a) outside
    b) inside
    c) outside=inside

    a) outside



    what techniques for measuring r and theta would you recommend for best results

    I used the tangent equation and derived for theta. I used the theta that I found and plugged it into the sin equation to find the opposite side, then I used the theory of similar triangles and lasers to find the radius.

    for circular motion the tension will always be _______ the weight

    greater than

    what do you conclude about the direction of the net force that keeps the flying pig in uniform circular motion

    The direction of the net force is in a radial direction towards the center/centripetal

    for uniform circular motion the centripetal force will always be _______ the tension in the string

    less than

    how did the pig overcome air friction

    the pig overcomes air friction by flapping its wings. this creates a centripetal force on the pig which in turn counters friction

    list sources of error for pig lab

    -timing not precise
    -didn't find the exact point at which the hypotenuse reaches the other leg of the triangle with the laser


    a device that measures acceleration


    the distance across a circle


    one earth rotation equal to 24 hours or 86,400 seconds


    long play record with 33.3rpm


    acronym for revolutions per minute (equal to .105 rad/s)


    half of a diameter


    the coefficient resulting from the circumference of a circle being divided by its diameter


    a merry-go-round


    the direction of a planet's momentum while in orbit


    360 degrees of 6.28 radians


    a straight line around which circular motion takes place


    one earth revolution equal to 365.25 days


    spinning with axis outside of a system


    a true center seeking force


    spinning with axis inside a system


    the direction of gravitational pull of sun on the earth


    the type of velocity found by dividing theta by seconds


    angle measure equal to length of radius around the circumference of a circle (57.3 degrees)


    an apparent center fleeing effect

    what type of circular motion does rpm apply to

    both rotation and revolution

    equation for theoretical speed of the pig


    equation for computing the speed of the pig


    percent difference equation

    (o-e)/e (100)

    equation used to calculate the omega and linear velocity of earth's rotation


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