one end of a vertical spring is attached to the ground with the other end above the ground such that the spring is at its equilibrium position. the spring has negligible mass and a spring constant k0 , as shown in figure 1. when an object of mass m0 is released from rest above the spring, the object falls and then makes contact with the top of the spring with a speed v0 , as shown in figure 2. the spring then compresses such that the object reaches a position x0 below the spring’s equilibrium position, as shown in figure 3, where the object comes to rest. the object is then directed upward by the spring until it is no longer in contact with the spring. the object then continues upward. the object-spring-earth system has zero gravitational potential energy at the instant shown in figure 2. all frictional forces are considered to be negligible.

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

Which two particles are found in the center of an atom

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.