Bell ringer- What effects the energy/speed of a pendulum?

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Kinetic and Potential Energy

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Presentation transcript:

Bell ringer- What effects the energy/speed of a pendulum? Length of line, tension, potential energy(height of drop), mass of ball

What did we learn yesterday? EQ: How is calculating potential energy similar or different from calculating kinetic energy? Language objective: Tell a peer how to calculate PE and KE.

Calculating PE Definition: Gravitational Potential Energy is the energy of an object’s position (height). Equation: PE=mass X Gravity(9.81)X height

Practice Potential Ms. Matthews decides to break the Guinness Book of World Records for bungee jumping. She goes to the Macau Tower in China where the current record is held. After several heart-pounding seconds, she leaps from a height of 233 meters. If her weight is 86 kilograms, what would her potential energy be just prior to jumping? Remember the EQ is PE=mass X Gravity(9.81)X height PGE=196,572.78 J

Calculating KE Definition: Kinetic energy is the energy of objects in motion Equation: KE = ½ mv2

Practice Kinetic When a golf ball is hit, it travels at 41 meters per second. The mass of a golf ball is 0.045 kg. What is the kinetic energy of the golf ball? Remember the EQ is KE = ½ mv2 KE=1/2 (.045) (1681) KE= 37.82 J

Kahoot Remember quiz Friday Types of energy (potential and Kinetic) Examples of KE and PE Deciding when KE and PE are greatest What effects PE and KE