A particle performs simple harmonic motion with amplitude 4.0cm and angular frequency 25rad s−1. Starting from the mean position at t=0 and moving towards the positive extreme, how much time does it take to go from displacement x1=1.0cm to x2=3.0cm for the first time?
a) 0.048s
b) 0.020s
c) 0.024s
d) 0.034s