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Quiz

Centres of mass

Seth-Riley Adams 9 questions

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Questions in this quiz (9)

  1. 1A body behaves as if its whole mass were concentrated at one point.
    1. ATrue
    2. BFalse
  2. 2Every body has a centre of [blank_start]mass[blank_end].
    1. Amass
  3. 3For a human, the centre of [blank_start]mass[blank_end] is somewhere in the [blank_start]midddle[blank_end] and the [blank_start]vertical[blank_end] line from it must be within the [blank_start]area[blank_end] enclosed by its [blank_start]feet[blank_end] or else it will [blank_start]fall[blank_end] over.
    1. Amass
    2. Bmiddle
    3. Cvertical
    4. Darea
    5. Efeet
    6. Ffall
  4. 4The [blank_start]centre[blank_end] of mass of a regulary [blank_start]shaped[blank_end] body that has the same [blank_start]density[blank_end] throughout is at its [blank_start]centre[blank_end]. In other cases it can be [blank_start]found[blank_end] by an [blank_start]experiment[blank_end].
    1. Acentre
    2. Bshaped
    3. Cdensity
    4. Dcentre
    5. Efound
    6. Fexperiment
  5. 5When the vertical line of a body's centre of mass doesn't go through the area of the body, the body will topple over.
    1. ATrue
    2. BFalse
  6. 6The [blank_start]stability[blank_end] of a body is [blank_start]increased[blank_end] by:
    (i) [blank_start]lowering[blank_end] its centre of mass, and
    (ii) [blank_start]increasing[blank_end] the area of its [blank_start]base[blank_end]
    1. Astability
    2. Bincreased
    3. Clowering
    4. Dincreasing
    5. Ebase
  7. 7[blank_start]Unstable[blank_end] equilibrium is when a body moves [blank_start]further[blank_end] away from its [blank_start]previous[blank_end] position when it is slightly displaced and then released.
    1. AUnstable
    2. Bfurther
    3. Cprevious
  8. 8[blank_start]Neutral[blank_end] equilibrium is when a body [blank_start]stays[blank_end] in its [blank_start]new[blank_end] position when [blank_start]displaced[blank_end].
    1. ANeutral
    2. Bstays
    3. Cnew
    4. Ddisplaced
  9. 9[blank_start]Stable[blank_end] equilibirum is when a body is slightly displaced and when it is released it [blank_start]returns[blank_end] to its [blank_start]previous[blank_end] position.
    1. AStable
    2. Breturns
    3. Cprevious

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Description
A small quiz that highlights all the relevant facts and formulas about centres of mass.
Language
English
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