Two blocks, A and B, are initially in contact and at rest. A spring with spring constant k = 450 n/m is attached to a wall on its left end and is in contact with Block A on its right end; the spring is uncompressed. See Picture 1. Block A is moved to the left, compressing the spring by 0.65 m. Block B remains stationary. See Picture 2. Block A is then released and moves towards Block B. The surface below the blocks has a coefficient of kinetic friction of uk = 0.60. The two blocks then collide, stick together, and move to the right as one object. Block A has a mass of mA= 5.0 kg and Block B has a mass of mB = 3.0 kg. a. What is the speed of Blocks A and B just after the collision? b. How far do Blocks C and D travel from the point of collison before coming to rest?

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Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest.