Question

4. Calculate radius of gyration about centroidal axes parallel to 40 mm side for rectangle of
dimensions 40mmx80mm
a) 2309 mm
b) 20.5 mm
c) 25.60 mm
d) 32.09 mm​

Answer 1

Answer:

b 20.5mm in the correct answer

Answer 2

Option (C) is correct.

The radius of gyration is 20.5 mm

Calculate the radius of gyration :

• The radius of gyration around a rotational axis is computed using the mass moment of inertia, which has the formula  $k=IM(1) (1) k = I M$ .

• The radius of gyration formula for the mass moment of inertia is (1).

• The gyration radius can be used to calculate a column's stiffness. The column will bend around the axis with the lower principle moment if the principal moments of the two-dimensional gyration tensor are not equal.