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Physical Science Study Guide Dixon Chapter 4 Energy Name____________ Period _______ *Contrast kinetic and potential energy by the following means: -by definition -by formula -by motion (give examples) *How does speeding up or slowing down affect kinetic energy? *How does friction relate to mechanical energy and thermal energy? Write a sentence using all three terms. *What are the units for the following measurements? -mass -energy -thermal energy -height -acceleration of gravity -speed *What would doubling an object’s velocity do to its kinetic energy? *Explain where chemical potential energy is stored? *What is elastic potential energy? *Give two examples of objects with different potential energies sitting next to each other on a shelf. *For two objects to have the same potential energy, what three things have to be identical? *Give two examples of electrical energy being converted to thermal energy. *Define mechanical energy. *Write the law of the conservation of energy. *What three things are used to calculate kinetic energy? *How do you calculate potential energy? *Define friction in terms of energy. *What process in green plants produces chemical potential energy? *Write out the formulas for kinetic energy and potential energy (include units) *Use the equation KE=1/2m x v2 to calculate the kinetic energy of a 100kg cart moving at a speed of 7 m/s? *Use the equation GPE= m x 9.8m/s2 x h to calculate the gravitational potential of a 10-kg sack of groceries on a shelf 1 m above the floor?