Step 1:

(1)

Mass of the banana hung on the spring is 1.20 kg.

The displacement of the spring is 1.50 cm = 0.015 m.

Force exerted by the spring .

Force exerted by the spring is equal to the gravitational force.

Force constant of the spring .

Solution:

Force constant of the spring .

 V_max

Step 1:

(2)

Amplitude of the oscillation is 20.0 cm.

Maximum speed = 80.0 cm/sec.

Force constant of the spring .

Maximum speed of the mass on the spring is

Mass of the monkey is .

Solution:

Mass of the monkey is .