8. Select the correct statement with respect to the figure given below: * d1 b a d2 Area = d, xd 2 C O The area is also equal to the product of its diagonals. The area is also equal to the product of its base and height. O The area is also equal to sum of its parallel sides
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Step-by-step explanation:
To locate the coordinates.
(a) By symmetry xcom=−d1/2=−(13cm)/2=−6.5cm. The negative value is due to our choice of the origin.
(b) We find ycom as
ycom=mi+mamiycom,i+maycom,a=ρiVi+ρaVaρiViycom,i+ρaVaycm,a
=7.85g/cm3+2.7g/cm3(11cm/2)(7.85g/cm3)+3(11cm/2)(2.7g/cm3)=8.3cm
(c) Again by symmetry , we have Zcom(2.8cm)/2=1.4cm .
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