A block of mass 3 kg is hung from a spring, causing it to stretch 21 cm at equilibrium, as shown below.

A block of mass 3 kg is hung from a spring,causing it to stretch 21 cm at equilibrium, asshown below.The 3 kg block is then replaced by a 4 kgblock, and the new block is released fromthe position shown below, at which point thespring is unstretched.21 cmymax 3 kgequilbrium4 kgHow far will the 4 kg block fall before itsdirection is reversed? Hint: For the new blockcase, the total distance of fall is twice theamplitude of the oscillation. The accelerationof gravity is 9.8 m/s2.Answer in units of cm.