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  • list three ways in which a person can increase the torque that they apply to a system

    increase/lengthen lever arm
    increase force
    apply force perpendicular to lever arm

    when does a system topple

    when the center of gravity of an object is below the area of support

    what type of person has the greatest stability

    women

    which type of person has the least stability

    children

    which type of person has moderate stability

    men

    what causes a rotating system to wobble

    if its center of gravity is not in line with its axis of symmetry

    torque

    a force that causes rotation

    if tcw=fd an tccw=fd, then...

    the torques are balanced

    how can you increase the lever arm of a screwdriver

    putting a wrench on the lever arm.

    ccw

    acronym for counter clockwise

    toppling

    occurs when cg is not above support base

    negative

    buoyancy that causes an object to sink through a medium

    balanced

    when cw and ccw torques are equal and no rotation occurs

    leverage

    the use of a long lever arm to increase torque

    positive

    buoyancy that causes an object to rise through a medium

    torque

    the product of force and lever arm measured in newton-meters

    stable

    an object that raises its cg with any displacement

    plumb bob

    a weighted object tied to a string and used to determine a vertical line

    children

    humans with highest cgs

    neutral

    an object that neither raises nor lowers its CG with any displacement

    unstable

    an object that lowers its CG with any displacement

    cw

    acronym for clockwise

    distance

    lever arm from axis of rotation to location where force is applied

    wobbling

    motion that results when CG is not located at the axis or rotation

    neutral

    buoyancy that causes an object to remain suspending in the medium that they displace

    women

    humans with he lowest CGs

    equilibrium

    when no rotation occurs because sigma torque = 0Nm

    CG

    acronym for center of gravity. the point where weight is measured from

    how is torque calculated

    t=Fd

    how can force be maximized

    >force
    >distance
    apply perpendicular force

    what happens when torques balance
    a) tcw=tccw
    b) sigma t = 0N
    c) no rotation
    d) all of these
    e) none of these

    d) all of these

    what is the lever arm of a screwdriver

    its radius

    what proportionality exists between the force and distance that yields a given torque

    inverse

    a cone resting on its flat base is in what type of equilibrium

    stable

    how does a physicist express the term righty tighty

    tcw

    what happens when the cg of a system is not above its support base

    toppling

    which child must sit closer to the fulcrum of a teeter totter in order to balance torques

    the heavy one

    where must the fulcrum of an empty meter stick lever be located in order to balance torques

    @CG

    which factor makes a building stable
    a) wide support base
    b) low CG
    c) both
    d)none

    c) both of these

    which end of the baseball bat has the greater mass when it balances horizontally on its fulcrum

    the short barrel

    what does a wobbling star indicate to astronomers
    a) planets
    b) cg away from axis
    c) both of these
    d) none of these

    c) both of these

    what happens to the CG of a glass of water when a ping pong ball is pushed below its surface

    it rises

    what happens when an axis of rotation is not located at the CG

    wobbling

    when a high jumper clears the bar, where does her CG go

    under the bar

    what portion of a baseball bat follows a smooth parabolic flight path when thrown through air

    the bat's CG

    what can a torque cause

    rotation

    which type of people have the lowest stability and the highest CG

    children

    what happens to the CG of a system in unstable equilibrium as it topples

    it moves down

    which term describes the distance between the axis and applied force that causes rotation

    lever arm

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