- #1
PFuser1232
- 479
- 20
If we apply the small angle approximation so that a simple pendulum can be considered to be under going SHM, what kind of potential energy would the pendulum bob be having? If the answer is gravitational potential energy, then we have a contradiction because this would mean that the bob would rise and descend periodically in 2 dimensions but SHM according to my knowledge is a one dimensional phenomenon. If the answer is other than gravitational potential energy, we still have a contradiction because the bob can't entirely oscillate in the horizontal direction without increasing the length of the string to which the mass is attached which is complete non-sense since the string is clearly inelastic in a simple pendulum.