Question

The time period of a simple pendulum is 1.2 s in a place where g=9.8m/s2

. How

long is the bob below the rigid point?​

Answer 1

Answer:

Consider a mechanism consisting of three spatial rigid bodies (including ground, N=4) and four joints: one revolute, one prismatic, one universal, and one spherical. According to Grubler's formula, how many degrees of freedom does the mechanism have?