A 400 Kg Mass Is Connected to a Spring with a a Spring

Multiple Choice

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

A) 41.0 cm/s
B) 32.8 cm/s
C) 19.2 cm/s
D) 12.8 cm/s
E) 9.05 cm/s