4. A 20g mass is attached to a spring on one side and to a 30g hanging mass by a string on the other side. The spring has a spring constant of 16N/m and is stretched 25cm past its equilibrium length. The coefficient of kinetic friction between the mass attached to the spring and the table is 0.1. a. If the system is released, what is the resulting acceleration? 20g 30gExtra Credit: What is the maximum height the hanging mass would rise? 1. A small block of tin, about 0.05 kg is dropped from at an astonishingly great height. The block started at 25 DC and upon hitting the ground completely melted (but did not heat up any more as a liquid).1 To keep things a bit simpler, imagine there is no air resistance and that the force of gravity is consistent for the entire fall.2 a. What was the speed of the tin just before it hit the ground? b. From what height was the tin dropped? c. If it took only 10 seconds for the tin to melt after hitting the ground, what was the average power of heating that occurred during the melting?3 d. Would an ice cube with a mass of 0.05 kg at 0 \"C dropped from this height meJt, heat up, and start to boil ifdropped from this height