1) 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 the mass of the object is 0.20 kg, what is the spring constant?
a. 40 N/m
b. 87 N/m
c. 126 N/m
d. 160 N/m
2) 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?
a. zero
b. 0.025 m
c. 0.036 m
d. 0.080 m
3) Consider the curve x = A sin(kt), with A > 0. At which point on the graph is it possible that t = 0?
a. Point t1
b. Point t2
c. Point t3
d. Point t4