1. The problem statement, all variables and given/known data A mass is attached to a spring with a force constant of 32N/m. The spring and the mass are set into simple harmonic motion on a frictionless, horizontal surface. The period of vibration of this mass is 0.4 seconds. a) Calculate the object's mass b) Calculate the frequency of the oscillations in the simple harmonic motion 2. Relevant equations T=period (seconds) f=frequency (Hz) m=mass (kg) k= force constant (N/m) T=2pi√(m/k) f=(1/2pi)√(k/m) 3. The attempt at a solution a) k(0.4/2pi)2=m k(0.394784176)=m m = 12.63309363 kg two sig digits: m = 13 b) f=1.570796327√(k/m) f=2.5 Hz Here's the thing: According to the answers in the book, part B is correct. However, they say that the answer to part A is [ m = 0.13kg ]. This isn't the first time that the book's answer has differed from my own by 101. Its actually the third time. However, previously I just wrote it off as a misprint. Now, I'm not so sure. So I'm here to see if I'm doing anything wrong. The strange thing is that the answer to part B meshes with the book's answer. I find that odd because the answer to part B is dependant on the answer yielded from part A (mass value). Insights?