Question

An elastic band is hung on a hook and a mass is hung on the lower end of the band. When the mass is pulled down and then released, it vibrates vertically. The equation of motion, s, where s is measured in centimeters and t≥0 in seconds, is 3cost+7sint. (Take the positive direction to be downward.) (c) When does the mass pass through the equilibrium position for the first time? (Round the answer to two decimal places.)