CHAPTER 5. Energy

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. It is highest at maximum heights.

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Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, which depends on its mass and velocity.

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Front

At which point does a roller coaster have the highest potential energy?

Back

At the maximum heights, such as points A and E.

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Front

At which point does a roller coaster have the highest kinetic energy?

Back

At point C, where the speed is greatest.

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Front

What is the relationship between kinetic and potential energy in a roller coaster?

Back

As potential energy decreases, kinetic energy increases, and vice versa, while the total mechanical energy remains constant.

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Front

What role does friction play in a roller coaster's motion?

Back

Friction opposes the motion of the roller coaster, preventing it from going higher than certain points.

Front

Why are the kinetic and potential energy equal at points B and D?

Back

Because these points correspond to the maximum speed the rider can reach, balancing kinetic and potential energy.

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Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for calculating potential energy?

Back

Potential energy (PE) = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

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Front

How does height affect potential energy?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has.

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