SI units

SI units problem 26

  • Determine the SI base units of stress. Show your working.

  • A beam PQ is clamped so that the beam is horizontal. A mass of is hung from end Q and the beam bends slightly, as illustrated in the figure below.

    The length of the beam from the edge of the clamp R to end Q is . The width of the beam is and the thickness of the beam is . The material of the beam has Young modulus .

    The mass is made to oscillate vertically. The time period of the oscillations is .

    The period is given by the expression:

    Determine in .


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