An ideal spring hangs from the ceiling. A 1.45 kg mass is hung from the spring, stretching the spring a distance ᵅ = 0.0855 m from its original length when it reaches equilibrium. The mass is then lifted up a distance ᵃ = 0.0285 m from the equilibrium position and released. What is the kinetic energy of the mass at the instant it passes back through the equilibrium position

m = 0.350 kg. (c) Is the original energy in the spring or in the cord? (d) Explain your answer to part (c). (e) Is the momentum of the system conserved in the bursting-apart process? Explain how that is possible considering (f) there are large forces acting and (g) there is no motion before- hand and plenty of motion afterward? 5. Two blocks of masses m ailu ne QIC are placed on a frictionless, hor- V izontal surface. A light spring is attached to the more mas- 3m m Before sive block, and the blocks are pushed together with the spring between them (Fig. P9.5). 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 2.00 m/s. (a) What is the velocity of the block of mass m? (b) Find the system's original elastic potential energy, taking 2.00 m/s 3m m After b Figure P9.5

An object has a mass of 0.5 kg is placed in front of a compressed spring. When the spring was released, the 0.5kg object collides with another object with mass 1.5kg and they move together as one unit. Find the velocity of boxes if the spring constant is 40N/m, and spring. was initially compressed by 20cm. Answer with text and/or attachments:

It compresses the spring 5.3 cm before coming to a stop.