a- The position of an oscillating object is given by x = 0, 05 sin(4t /3), or x is in metres and t in seconds. What is the shortest time after t = 0 or the position is maximum positive? b- A single pendulum 1.0 m long performs 19 completed oscillations in 40 s. What is the local value of g? c- If we increase the oscillation amplitude of a spring block system by 5%, what is the percentage change in maximum acceleration