# physics

posted by
**sway**
.

A 0.50 kg mass at the end of a spring vibrates 6.0 times per second with an amplitude of 0.18 m.

(a) Determine the velocity when it passes the equilibrium point.

1Your answer is incorrect. m/s

(b) Determine the velocity when it is 0.02 m from equilibrium.

2 m/s

(c) Determine the total energy of the system.

3 J

(d) Complete the equation describing the motion of the mass, assuming that x was a maximum at t = 0.

4 m cos[ ( 5 rad/s )t ]