Kinetic Energy

What is energy?

• Amount of change

• A unit of measurement for temperature

• A type of liquid

• A model of how fast something moves

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What is kinetic energy?

• The energy possessed by an object due to its motion

• The energy possessed by an object due to its position

• The rate of doing work

• The capacity to do work due to the heat of an object

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What is the law of conservation of energy?

• Energy cannot be created or destroyed, only transformed from one form to another.

• Energy is always lost when converting from one form to another.

• Energy can be created during chemical reactions.

• Energy is conserved only in closed systems.

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Which statement rephrases the Law of Conservation?

• The energy you start with is always less than you end with

• The energy you start with is always more than you end with

• The energy you start with is always equal to the energy you end with

• The amount of energy depends on the type

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Using the concept of kinetic energy, how can you decide which tennis racket is best for you?

• By comparing the weight of different rackets

• By assessing the grip size and material

• By evaluating the racket's balance and frame stiffness in relation to kinetic energy transfer

• By picking the heaviest one you can swing the fastest.

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What would give you more energy, doubling your mass or doubling your speed?

• Doubling your mass

• Doubling your speed

• Both give the same amount of energy

• None of the above

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What is the kinetic energy of a 5kg ball that is travelling 3m/s?

• 22.5 Joules

• 45 Joules

• 15 Joules

• 30 Joules

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What is the kinetic energy of a 5 kg ball that is travelling 6m/s?

• 90 Joules

• 180 Joules

• 45 Joules

• None of the above

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NGSS.HS-PS3-2

What is the POTENTIAL energy of a 10kg ball that is 3 meters high??

• 294 Joules

• 30 Joules

• 135 Joules

• 408 Joules

Why must the first hill of a roller coaster be the tallest?

• To build anticipation and excitement

• To ensure the train has enough energy for the rest of the ride

• It doesn't, it is just tradition

• To make the ride longer

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