A 900 Kg Mass Is Connected to a Spring with a a Spring

Multiple Choice

A 9.00 kg mass is connected to a spring with a spring constant of 4.00 N/m. The velocity is given by the expression v(t) = (12.8 cm/s) cos(ω t + π/4) . What is the amplitude of the oscillations?

A) 13.6 cm
B) 19.2 cm
C) 35.3 cm
D) 40.4 cm
E) 45.5 cm