Does time period of SHM vary with frame(inertial and non inertial)?? 1. The problem statement, all variables and given/known data There is an SHM. First observer is watching it from inertial frame of refrence and secodn is from non inertial will there any change of time period for both observer. 2. Relevant equations just think about it. 3. The attempt at a solution I have done a question on SHM. that was solved example first i do that with my self with non inertial frame of reference and then when i see it in book it was done by inertial frame. However my answer was matching with answer of the book. After i think on it. I come to conclusion that speed is not too fast so clock of both observer run with same speed hence both observers will see it with same time period.. thanks.. waiting for your response.