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A large spring requires a force of 150 N to compress it only 0.010 m. What is the spring constant of the spring? (15 000 N/m) A 0.20 kg object, attached to a spring with spring constant k = 10 N/m, is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.080 m. What is its speed at the instant when its displacement is 0.040 m? (49 cm/s) A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t=0), what is the speed of the mass when t = 3 s? (zero) A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t=0), what is the acceleration magnitude when t = 3 s? (25.3 m/s) A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If a timer is started when its displacement is a maximum (hence x = = 8 cm when t=0), what is the displacement of the mass when t = 3.7 s? (0.025 m)