Potential and Kinetic Energy Aim: How can we determine the different types of energy an object has?

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Potential and Kinetic Energy Aim: How can we determine the different types of energy an object has?

Potential Energy The energy possessed by an object due to its position (HEIGHT) or condition Potential Energy Units: Joules (J) Mass Units: (kg) Gravity Units: 9.81m/s 2 Height Units: meters (m)

Example #1 How much potential energy does a 2kg book have when it is on a shelf that is 1.75m above the ground?

Example #2 Mr. O (80kg) is done shopping on the second floor of the mall and needs to stop by the Apple store that is on the 3 rd floor. If the second floor is 3m above the ground and the third floor is 6m above the ground, how much potential energy did Mr. O gain?

Kinetic Energy The energy of a MOVING object Kinetic Energy Units: Joules (J) Mass Units: (kg) Velocity Units: (m/s)

Example #3 How much kinetic energy does a 180g softball have when its pitched at a speed of 35m/s?

Example #4 How fast must a 1325kg Prius travel in order to have 2.65×10 5 J of kinetic energy?

Elastic Potential Energy The energy stored in an elastic object (spring) when work is done to compress or extend it Elastic Potential Energy Units: Joules (J) Spring Constant Units: (N/m) Spring Compression/ Extension Units: (m)

Example #5 How much energy is stored in a 100N/m spring that is compressed 0.3 meters?

Example #6 2.5kg of tomatoes is placed on a produce scale. How much stored energy does the spring have if the spring constant is 750N/m? F s = F g