Conservation of mechanical energy applies here, so: ½ (m+M)v f 2 = (m+M)gh. So, the speed of the system immediately after the collision is: v f = (2gh) ½. Apply conservation of momentum to determine the relationship between v f and the bullet's speed before the collision. The wood block is stationary before the collision.

Image Transcriptionclose. i- Calculate the ratio of the mechanical energy at B and mechanical energy at A (E/EA) and (EJEB). What do these ratios tell you about the conservation of energy? ii- Is the mechanical energy conserved between A and B?

Conservation of Energy with Examples. CONSERVATION OF ENERGY THEOREM. Nothing can be destroyed or created in the universe like energy. Suppose that a ball falls from height of 2m, it has only potential energy at the beginning, however, as it falls it gains kinetic energy and its velocity increases.

The kinetic mechanical energy it once had now transforms back into gravitational potential energy. Once the ball is past its maximum height it will rely on the force of gravity to bring it down into the receiver's hand. As it is moves downward, the gravitational potential energy transforms into mechanical kinetic energy.

The formula of conservation of energy: An object (or multiple objects) in a closed system can have both kinetic and potential energy. The total energy in that system, which is the sum of the kinetic and potential energy, is termed as total mechanical energy. As mentioned earlier, if the system is not subject to external influence, the total ...