1) Suppose a 0.3 kg mass on a spring tha has been compressed 0.10m has elastic potential energy of 1 J. What is the spring constant? Also, how much further must the spring be compressed to triple the elastic potential energy?

2) A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0cm. If a timer is started when its displacement is a maximum (hence x=4cm when t=0), what is the acceleration magnitude when t=3s?

3) A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0cm. If a timer is started when its displacement is a maximum (hence x=4cm when t=0), what is the speed of the mass when t=3s?

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