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.)

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.)