Conservation of Energy, Mechanical Energy

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed

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Potential or kinetic?
Stretched bow and arrow?

• kinetic
• potential

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Potential or kinetic?
Running?

• potential
• kinetic

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On a roller coaster, where is maximum potential energy?

• At the bottom of a big hill
• When going around a corner
• When going upside down
• At the top of a big hill

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On a roller coaster, where is maximum kinetic energy?

• At the bottom of a big hill
• When going around a corner
• When going upside down
• At the top of a big hill

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NGSS.MS-PS3-1

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What force causes the carts to slow down?

• friction
• applying force
• gravity
• gravity and friction

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________ is the energy possessed by an object because of its motion.

• Power
• Force 
• energy
• kinetic energy

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A moving object will eventually come to a stop due to friction because...

• All of the energy in the system was destroyed
• All of the energy in the system was transformed into thermal energy
• The system could not create enough energy to keep the object moving

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In a real life situation, when a roller coaster is released from the top of a hill, halfway down the hill...

• Exactly half of the energy is kinetic and half of the energy is potential
• All of the energy is potential
• All of the energy is kinetic
• Some of the potential is converted to kinetic and a small amount is transformed into thermal energy

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NGSS.MS-PS3-2

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As the skater was moved higher up the ramp, the amount of potential energy...

• Increased
• Decreased
• Stayed the same

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