⇒ The principle of conservation of energy is as follows: energy cannot be created or destroyed, but may be transferred from one form of energy to another
⇒ The formulas for gravitational potential, elastic potential, and kinetic energy can be used to calculate and predict the motion of bodies as one form of energy is transferred to another
A stretched catapult stores 0.7J of elastic potential. The catapult is used to launch a marble of mass 0.01kg. Calculate the initial speed of the marble.
Answer: the stored elastic potential energy in the catapult is transferred to the marble's kinetic energy.
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