question_answer 61)

                  A body of mass m is attached to one end of a massless spring which is suspended vertically from a fixed point. The mass is held in hand so that the spring is neither stretched nor compressed. Suddenly the support of the hand is removed. The lowest position attained by the mass during oscillation is 4 cm below the point, where it was held in hand.                 (a) What is die amplitude of oscillation?                 (b) Find the frequency of oscillation?

Answer:

                  (a) The mass m will oscillate about a about in between the lowest position and the position where it was held in hand. Thus, lowest position and position of hand will be extreme positions. The half of the distance between extreme positions is known as amplitude. Therefore, the amplitude of oscillation \[=\frac{4\,cm}{2}\,=\,2\,cm\].