Question

(10 points) A rectangular block, with face lengths a 35 cm and b 45 cm, is to be suspended on a thin horizontal rod running through a narrow hole in the block. The block is then to be set swinging about the rod like a pendulum, through small angles so that it is in simple harmonic motion (SHM) Figure 4 shows one possible position of the hole, at distance r from the block's center, along a line connecting the center with a corner. (a) Plot the period of the pendulum versus distance r along that line such that the minimum in the curve is apparent. (b) For what value of r does that minimum occur? There is actually a line of points around the block's center for which the period of swinging has the same minimum value. (c) What shape does that line make?

i don't know (c)

Answer 1

b) 12 2_ M91 1.2 M93 12 3 Эт! 12 12 O cfrcle a radia8 116.46 cm