Atransverse wave on a string is modeled with the wave function y(x, t) = (0.20 cm) sin (2.00 m^-1 x - 3.00 s^-1 t + pi/16) what is the height of the string with respect to the equilibrium position at a position x = 4.00m and a time t = 10.00 s

a. -0.037 cm
b. -0.037 cm
c. 0.370 cm
d. 0.370 cm

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.