1. a. Amplitude a = 6
b. Initial velocity = − 9 cm/s
c. Initial position x = 3√3 cm
d. Frequency T = 3/ 2π per second
e. Time t = π / 9 seconds
2. a. x = 4 cos (πt / 10)
b. vMAX= 2π/5 m/s
c. t = 10/3 seconds
Speed v = 1.09 m/s
Acceleration = -0.197 m/s2
3. a. a = 18
b. α = -0.685
c. Max speed = 6 m/s