Question

answer this with explanation. ​

Answer 1

Answer: D

Explanation:Let the stiffness of spring A be K1 and of spring B be K2 ,for the individual spring A the time period will be 2π√(m/k1) and for Spring B will be 2π√(m/k2) ,now with both the springs together compress or elongate the block , both springs will do simultaneous common motion that implies the springs are in parallel,so equivalent spring constant will be (k1 + k2) for parallel ,so the time period will be 2π√{m/(k1+k2)}

Which will satisfy D as answer

Hope it helped !