I need part d,f and g Two blocks of masses m and 3m are placed on a frictionless

Question

I need part d,f and g

Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is attached to the more massive block, and the blocks are pushed together with the spring between them as shown in the figure below. A cord initially holding the blocks together is burned; after that happens, the block of mass 3m moves to the right with a speed of v3m - 1.85 m/s. After? What is the velocity of the block of mass m? (Assume right is positive and left is negative.) Find the system's original elastic potential energy, taking m - 0.370 kg. Is the original energy in the spring or in the cord? Explain your answer to part (c). Is the momentum of the system conserved in the bursting-apart process? Explain how that is possible considering there are large forces acting. This answer has rot been graded yet. Explain how that is possible considering there is no motion beforehand and plenty of motion afterward?

Explanation / Answer

d) Energy is in the Spring because the spring is deformed and as soon as the cord is cut, the spring gets restored by forcing the blocks to move apart. While on the other hand, the cord just holds the blocks together; the cord cannot exert pushing force on the blocks.

f) Even if large forces are present there is no problem. Momentum is always conserved if we neglect any deformation of the masses.

g) There is no motion beforehand and after the cutting of the cord there is motion. The momentum conservation is never violated. Because one block moves in one direction and the other block in the opposite direction. Essentially, the centre of mass of the whole system(two blocks) remains in the same position.

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